diff --git a/src/ProjectTemplates/Web.ProjectTemplates/BlazorServerWeb-CSharp.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/BlazorServerWeb-CSharp.csproj.in
index fb2add30603f..3aa0d59a356c 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/BlazorServerWeb-CSharp.csproj.in
+++ b/src/ProjectTemplates/Web.ProjectTemplates/BlazorServerWeb-CSharp.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
     <UserSecretsId Condition="'$(IndividualAuth)' == 'True' OR '$(OrganizationalAuth)' == 'True'">aspnet-BlazorServerWeb_CSharp-53bc9b9d-9d6a-45d4-8429-2a2761773502</UserSecretsId>
     <WebProject_DirectoryAccessLevelKey Condition="'$(OrganizationalAuth)' == 'True' AND '$(OrgReadAccess)' != 'True'">0</WebProject_DirectoryAccessLevelKey>
     <WebProject_DirectoryAccessLevelKey Condition="'$(OrganizationalAuth)' == 'True' AND '$(OrgReadAccess)' == 'True'">1</WebProject_DirectoryAccessLevelKey>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Client.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Client.csproj.in
index 4fbe364042a7..b323afcf4dd2 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Client.csproj.in
+++ b/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Client.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
     <!--#if PWA -->
     <ServiceWorkerAssetsManifest>service-worker-assets.js</ServiceWorkerAssetsManifest>
     <!--#endif -->
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Server.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Server.csproj.in
index 67f34756c0fc..a3dad84ee5ad 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Server.csproj.in
+++ b/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Server.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
     <UserSecretsId Condition="'$(IndividualAuth)' == 'True' OR '$(OrganizationalAuth)' == 'True'">ComponentsWebAssembly-CSharp.Server-53bc9b9d-9d6a-45d4-8429-2a2761773502</UserSecretsId>
     <WebProject_DirectoryAccessLevelKey Condition="'$(OrganizationalAuth)' == 'True' AND '$(OrgReadAccess)' != 'True'">0</WebProject_DirectoryAccessLevelKey>
     <WebProject_DirectoryAccessLevelKey Condition="'$(OrganizationalAuth)' == 'True' AND '$(OrgReadAccess)' == 'True'">1</WebProject_DirectoryAccessLevelKey>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Shared.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Shared.csproj.in
index fdffee5bc537..3116e35440b1 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Shared.csproj.in
+++ b/src/ProjectTemplates/Web.ProjectTemplates/ComponentsWebAssembly-CSharp.Shared.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/EmptyWeb-CSharp.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/EmptyWeb-CSharp.csproj.in
index 29cbeb320f96..d6194302d3ea 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/EmptyWeb-CSharp.csproj.in
+++ b/src/ProjectTemplates/Web.ProjectTemplates/EmptyWeb-CSharp.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
     <NoDefaultLaunchSettingsFile Condition="'$(ExcludeLaunchSettings)' == 'True'">True</NoDefaultLaunchSettingsFile>
     <RootNamespace Condition="'$(name)' != '$(name{-VALUE-FORMS-}safe_namespace)'">Company.WebApplication1</RootNamespace>
     <LangVersion>preview</LangVersion>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.csproj.in
index f7a69fba22f2..2648730fd546 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.csproj.in
+++ b/src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/RazorClassLibrary-CSharp.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/RazorClassLibrary-CSharp.csproj.in
index 298bcecd8dd1..bbb34e70009d 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/RazorClassLibrary-CSharp.csproj.in
+++ b/src/ProjectTemplates/Web.ProjectTemplates/RazorClassLibrary-CSharp.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
     <AddRazorSupportForMvc Condition="'$(SupportPagesAndViews)' == 'True'">true</AddRazorSupportForMvc>
     <RootNamespace Condition="'$(name)' != '$(name{-VALUE-FORMS-}safe_namespace)'">Company.RazorClassLibrary1</RootNamespace>
   </PropertyGroup>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/RazorPagesWeb-CSharp.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/RazorPagesWeb-CSharp.csproj.in
index 5869c4f86890..6f93d927ca87 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/RazorPagesWeb-CSharp.csproj.in
+++ b/src/ProjectTemplates/Web.ProjectTemplates/RazorPagesWeb-CSharp.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
     <UserSecretsId Condition="'$(IndividualAuth)' == 'True' OR '$(OrganizationalAuth)' == 'True'">aspnet-Company.WebApplication1-0ce56475-d1db-490f-8af1-a881ea4fcd2d</UserSecretsId>
     <NoDefaultLaunchSettingsFile Condition="'$(ExcludeLaunchSettings)' == 'True'">True</NoDefaultLaunchSettingsFile>
     <RootNamespace Condition="'$(name)' != '$(name{-VALUE-FORMS-}safe_namespace)'">Company.WebApplication1</RootNamespace>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/StarterWeb-CSharp.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/StarterWeb-CSharp.csproj.in
index 2da0a7fcb7d4..854c6b9efa17 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/StarterWeb-CSharp.csproj.in
+++ b/src/ProjectTemplates/Web.ProjectTemplates/StarterWeb-CSharp.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
     <UserSecretsId Condition="'$(IndividualAuth)' == 'True' OR '$(OrganizationalAuth)' == 'True'">aspnet-Company.WebApplication1-53bc9b9d-9d6a-45d4-8429-2a2761773502</UserSecretsId>
     <NoDefaultLaunchSettingsFile Condition="'$(ExcludeLaunchSettings)' == 'True'">True</NoDefaultLaunchSettingsFile>
     <RootNamespace Condition="'$(name)' != '$(name{-VALUE-FORMS-}safe_namespace)'">Company.WebApplication1</RootNamespace>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/WebApi-CSharp.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/WebApi-CSharp.csproj.in
index 24f92d2299c7..3624e77631ce 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/WebApi-CSharp.csproj.in
+++ b/src/ProjectTemplates/Web.ProjectTemplates/WebApi-CSharp.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
     <UserSecretsId Condition="'$(IndividualAuth)' == 'True' OR '$(OrganizationalAuth)' == 'True'">aspnet-Company.WebApplication1-53bc9b9d-9d6a-45d4-8429-2a2761773502</UserSecretsId>
     <NoDefaultLaunchSettingsFile Condition="'$(ExcludeLaunchSettings)' == 'True'">True</NoDefaultLaunchSettingsFile>
     <RootNamespace Condition="'$(name)' != '$(name{-VALUE-FORMS-}safe_namespace)'">Company.WebApplication1</RootNamespace>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/Worker-CSharp.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/Worker-CSharp.csproj.in
index 284920b4f68c..77a387f3f6bd 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/Worker-CSharp.csproj.in
+++ b/src/ProjectTemplates/Web.ProjectTemplates/Worker-CSharp.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
     <UserSecretsId>dotnet-Company.Application1-53bc9b9d-9d6a-45d4-8429-2a2761773502</UserSecretsId>
     <NoDefaultLaunchSettingsFile Condition="'$(ExcludeLaunchSettings)' == 'True'">True</NoDefaultLaunchSettingsFile>
     <RootNamespace Condition="'$(name)' != '$(name{-VALUE-FORMS-}safe_namespace)'">Company.Application1</RootNamespace>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Areas/Identity/Pages/Shared/_LoginPartial.cshtml b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Areas/Identity/Pages/Shared/_LoginPartial.cshtml
index a4f854aac31f..eda27e908a71 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Areas/Identity/Pages/Shared/_LoginPartial.cshtml
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Areas/Identity/Pages/Shared/_LoginPartial.cshtml
@@ -7,7 +7,7 @@
 @if (SignInManager.IsSignedIn(User))
 {
     <li class="nav-item">
-        <a  class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage">Hello @User.Identity.Name!</a>
+        <a  class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage">Hello @User.Identity?.Name!</a>
     </li>
     <li class="nav-item">
         <form class="form-inline" asp-area="Identity" asp-page="/Account/Logout" asp-route-returnUrl="/" method="post">
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Data/WeatherForecast.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Data/WeatherForecast.cs
index dbe0d36a71e1..b5247b3cdfb7 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Data/WeatherForecast.cs
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Data/WeatherForecast.cs
@@ -10,6 +10,6 @@ public class WeatherForecast
 
         public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
 
-        public string Summary { get; set; }
+        public string? Summary { get; set; }
     }
 }
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Pages/Error.cshtml.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Pages/Error.cshtml.cs
index 4c944dc5d82c..f31173281588 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Pages/Error.cshtml.cs
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Pages/Error.cshtml.cs
@@ -13,7 +13,7 @@ namespace BlazorServerWeb_CSharp.Pages
     [IgnoreAntiforgeryToken]
     public class ErrorModel : PageModel
     {
-        public string RequestId { get; set; }
+        public string? RequestId { get; set; }
 
         public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
 
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Pages/FetchData.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Pages/FetchData.razor
index ea60772f8bf8..07550a157a70 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Pages/FetchData.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Pages/FetchData.razor
@@ -37,7 +37,7 @@ else
 }
 
 @code {
-    private WeatherForecast[] forecasts;
+    private WeatherForecast[]? forecasts;
 
     protected override async Task OnInitializedAsync()
     {
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.IndividualB2CAuth.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.IndividualB2CAuth.razor
index f185b33f6a79..4b78bfa1fba8 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.IndividualB2CAuth.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.IndividualB2CAuth.razor
@@ -6,11 +6,11 @@
     <Authorized>
         @if (canEditProfile)
         {
-            <a href="MicrosoftIdentity/Account/EditProfile">Hello, @context.User.Identity.Name!</a>
+            <a href="MicrosoftIdentity/Account/EditProfile">Hello, @context.User.Identity?.Name!</a>
         }
         else
         {
-            <text>Hello, @context.User.Identity.Name!</text>
+            <text>Hello, @context.User.Identity?.Name!</text>
         }
         <a href="MicrosoftIdentity/Account/SignOut">Log out</a>
     </Authorized>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.IndividualLocalAuth.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.IndividualLocalAuth.razor
index 25f9db264b4a..b4e823afdf13 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.IndividualLocalAuth.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.IndividualLocalAuth.razor
@@ -1,6 +1,6 @@
 <AuthorizeView>
     <Authorized>
-        <a href="Identity/Account/Manage">Hello, @context.User.Identity.Name!</a>
+        <a href="Identity/Account/Manage">Hello, @context.User.Identity?.Name!</a>
         <form method="post" action="Identity/Account/LogOut">
             <button type="submit" class="nav-link btn btn-link">Log out</button>
         </form>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.OrganizationalAuth.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.OrganizationalAuth.razor
index 0fcc5bd960fa..355402c75290 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.OrganizationalAuth.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.OrganizationalAuth.razor
@@ -1,6 +1,6 @@
 <AuthorizeView>
     <Authorized>
-        Hello, @context.User.Identity.Name!
+        Hello, @context.User.Identity?.Name!
         <a href="MicrosoftIdentity/Account/SignOut">Log out</a>
     </Authorized>
     <NotAuthorized>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.WindowsAuth.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.WindowsAuth.razor
index bf579153e2b6..de92ffd80446 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.WindowsAuth.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/LoginDisplay.WindowsAuth.razor
@@ -1,3 +1,3 @@
 <AuthorizeView>
-    Hello, @context.User.Identity.Name!
+    Hello, @context.User.Identity?.Name!
 </AuthorizeView>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.CallsMicrosoftGraph.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.CallsMicrosoftGraph.razor
index 0f1ca20ce43b..e2560f475195 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.CallsMicrosoftGraph.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.CallsMicrosoftGraph.razor
@@ -33,7 +33,7 @@
 @code {
     private bool collapseNavMenu = true;
 
-    private string NavMenuCssClass => collapseNavMenu ? "collapse" : null;
+    private string? NavMenuCssClass => collapseNavMenu ? "collapse" : null;
 
     private void ToggleNavMenu()
     {
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.CallsWebApi.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.CallsWebApi.razor
index 5ff1bcc48f17..e3c5fa2d38b2 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.CallsWebApi.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.CallsWebApi.razor
@@ -33,7 +33,7 @@
 @code {
     private bool collapseNavMenu = true;
 
-    private string NavMenuCssClass => collapseNavMenu ? "collapse" : null;
+    private string? NavMenuCssClass => collapseNavMenu ? "collapse" : null;
 
     private void ToggleNavMenu()
     {
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.NoGraphOrApi.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.NoGraphOrApi.razor
index 3ef704312275..d2d9f0920d25 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.NoGraphOrApi.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/NavMenu.NoGraphOrApi.razor
@@ -28,7 +28,7 @@
 @code {
     private bool collapseNavMenu = true;
 
-    private string NavMenuCssClass => collapseNavMenu ? "collapse" : null;
+    private string? NavMenuCssClass => collapseNavMenu ? "collapse" : null;
 
     private void ToggleNavMenu()
     {
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/SurveyPrompt.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/SurveyPrompt.razor
index 67270dc0f42d..8b0973e8d0ae 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/SurveyPrompt.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Shared/SurveyPrompt.razor
@@ -12,5 +12,5 @@
 @code {
     // Demonstrates how a parent component can supply parameters
     [Parameter]
-    public string Title { get; set; }
+    public string? Title { get; set; }
 }
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Pages/FetchData.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Pages/FetchData.razor
index a36d7d157d4b..c7f29e303752 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Pages/FetchData.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Pages/FetchData.razor
@@ -45,7 +45,7 @@ else
 }
 
 @code {
-    private WeatherForecast[] forecasts;
+    private WeatherForecast[]? forecasts;
 
     protected override async Task OnInitializedAsync()
     {
@@ -74,7 +74,7 @@ else
 
         public int TemperatureC { get; set; }
 
-        public string Summary { get; set; }
+        public string? Summary { get; set; }
 
         public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
     }
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/LoginDisplay.IndividualLocalAuth.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/LoginDisplay.IndividualLocalAuth.razor
index 7cee41dcd07f..ce8bd5070af0 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/LoginDisplay.IndividualLocalAuth.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/LoginDisplay.IndividualLocalAuth.razor
@@ -7,7 +7,7 @@
 <AuthorizeView>
 @*#if (Hosted)
     <Authorized>
-        <a href="authentication/profile">Hello, @context.User.Identity.Name!</a>
+        <a href="authentication/profile">Hello, @context.User.Identity?.Name!</a>
         <button class="nav-link btn btn-link" @onclick="BeginSignOut">Log out</button>
     </Authorized>
     <NotAuthorized>
@@ -16,7 +16,7 @@
     </NotAuthorized>
   #else
     <Authorized>
-        Hello, @context.User.Identity.Name!
+        Hello, @context.User.Identity?.Name!
         <button class="nav-link btn btn-link" @onclick="BeginSignOut">Log out</button>
     </Authorized>
     <NotAuthorized>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/LoginDisplay.IndividualMsalAuth.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/LoginDisplay.IndividualMsalAuth.razor
index 1ecb6b202472..7ebea5d348e3 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/LoginDisplay.IndividualMsalAuth.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/LoginDisplay.IndividualMsalAuth.razor
@@ -6,7 +6,7 @@
 
 <AuthorizeView>
     <Authorized>
-        Hello, @context.User.Identity.Name!
+        Hello, @context.User.Identity?.Name!
         <button class="nav-link btn btn-link" @onclick="BeginLogout">Log out</button>
     </Authorized>
     <NotAuthorized>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/NavMenu.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/NavMenu.razor
index 1afa4c3a2888..fb04d2c242e0 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/NavMenu.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/NavMenu.razor
@@ -28,7 +28,7 @@
 @code {
     private bool collapseNavMenu = true;
 
-    private string NavMenuCssClass => collapseNavMenu ? "collapse" : null;
+    private string? NavMenuCssClass => collapseNavMenu ? "collapse" : null;
 
     private void ToggleNavMenu()
     {
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/SurveyPrompt.razor b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/SurveyPrompt.razor
index a927a322f2b3..2f7758536aad 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/SurveyPrompt.razor
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/Shared/SurveyPrompt.razor
@@ -12,5 +12,5 @@
 @code {
     // Demonstrates how a parent component can supply parameters
     [Parameter]
-    public string Title { get; set; }
+    public string? Title { get; set; }
 }
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Server/Areas/Identity/Pages/Shared/_LoginPartial.cshtml b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Server/Areas/Identity/Pages/Shared/_LoginPartial.cshtml
index 913f4c479bf7..1be0a5451871 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Server/Areas/Identity/Pages/Shared/_LoginPartial.cshtml
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Server/Areas/Identity/Pages/Shared/_LoginPartial.cshtml
@@ -15,7 +15,7 @@
 @if (SignInManager.IsSignedIn(User))
 {
     <li class="nav-item">
-        <a  class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage">Hello @User.Identity.Name!</a>
+        <a  class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage">Hello @User.Identity?.Name!</a>
     </li>
     <li class="nav-item">
         <form class="form-inline" asp-area="Identity" asp-page="/Account/Logout" asp-route-returnUrl="/" method="post">
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Server/Pages/Error.cshtml.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Server/Pages/Error.cshtml.cs
index 92282ce4c268..7f7954b08457 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Server/Pages/Error.cshtml.cs
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Server/Pages/Error.cshtml.cs
@@ -13,7 +13,7 @@ namespace ComponentsWebAssembly_CSharp.Server.Pages
     [IgnoreAntiforgeryToken]
     public class ErrorModel : PageModel
     {
-        public string RequestId { get; set; }
+        public string? RequestId { get; set; }
 
         public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
 
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Shared/WeatherForecast.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Shared/WeatherForecast.cs
index 32e3d002de0b..9f0d7ac7a405 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Shared/WeatherForecast.cs
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Shared/WeatherForecast.cs
@@ -10,7 +10,7 @@ public class WeatherForecast
 
         public int TemperatureC { get; set; }
 
-        public string Summary { get; set; }
+        public string? Summary { get; set; }
 
         public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
     }
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Error.cshtml.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Error.cshtml.cs
index 10108d2b1017..121dc6440ee1 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Error.cshtml.cs
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Error.cshtml.cs
@@ -13,7 +13,7 @@ namespace Company.WebApplication1.Pages
     [IgnoreAntiforgeryToken]
     public class ErrorModel : PageModel
     {
-        public string RequestId { get; set; }
+        public string? RequestId { get; set; }
 
         public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
 
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_Layout.cshtml b/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_Layout.cshtml
index d13e40d4a67f..5f16c50b8562 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_Layout.cshtml
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_Layout.cshtml
@@ -28,7 +28,7 @@
     @*#if (IndividualAuth || OrganizationalAuth)
                     <partial name="_LoginPartial" />
     #elseif (WindowsAuth)
-                    <p class="nav navbar-text">Hello, @User.Identity.Name!</p>
+                    <p class="nav navbar-text">Hello, @User.Identity?.Name!</p>
     #endif*@
                 </div>
             </div>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_LoginPartial.Identity.cshtml b/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_LoginPartial.Identity.cshtml
index c45b365fd466..7cc3147e0816 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_LoginPartial.Identity.cshtml
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_LoginPartial.Identity.cshtml
@@ -6,7 +6,7 @@
 @if (SignInManager.IsSignedIn(User))
 {
     <li class="nav-item">
-        <a  class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage">Hello @User.Identity.Name!</a>
+        <a  class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage">Hello @User.Identity?.Name!</a>
     </li>
     <li class="nav-item">
         <form class="form-inline" asp-area="Identity" asp-page="/Account/Logout" asp-route-returnUrl="@Url.Page("/", new { area = "" })" method="post" >
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_LoginPartial.OrgAuth.cshtml b/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_LoginPartial.OrgAuth.cshtml
index 8f7c9041e83e..9e3a8af9c03c 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_LoginPartial.OrgAuth.cshtml
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Pages/Shared/_LoginPartial.OrgAuth.cshtml
@@ -11,20 +11,20 @@
 
 <ul class="navbar-nav">
 @*#if (IndividualB2CAuth)
-@if (User.Identity.IsAuthenticated)
+@if (User.Identity?.IsAuthenticated == true)
 {
         @if (!string.IsNullOrEmpty(options.EditProfilePolicyId))
         {
             <li class="nav-item">
                 <a class="nav-link text-dark" asp-area="MicrosoftIdentity" asp-controller="Account" asp-action="EditProfile">
-                    <span class="text-dark">Hello @User.Identity.Name!</span>
+                    <span class="text-dark">Hello @User.Identity?.Name!</span>
                 </a>
             </li>
         }
         else
         {
             <li class="nav-item">
-                <span class="navbar-text text-dark">Hello @User.Identity.Name!</span>
+                <span class="navbar-text text-dark">Hello @User.Identity?.Name!</span>
             </li>
         }
         <li class="nav-item">
@@ -38,10 +38,10 @@ else
         </li>
 }
 #else
-@if (User.Identity.IsAuthenticated)
+@if (User.Identity?.IsAuthenticated == true)
 {
         <li class="nav-item">
-            <span class="navbar-text text-dark">Hello @User.Identity.Name!</span>
+            <span class="navbar-text text-dark">Hello @User.Identity?.Name!</span>
         </li>
         <li class="nav-item">
             <a class="nav-link text-dark" asp-area="MicrosoftIdentity" asp-controller="Account" asp-action="SignOut">Sign out</a>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Models/ErrorViewModel.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Models/ErrorViewModel.cs
index 6fe06d375908..665acaf669be 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Models/ErrorViewModel.cs
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Models/ErrorViewModel.cs
@@ -4,7 +4,7 @@ namespace Company.WebApplication1.Models
 {
     public class ErrorViewModel
     {
-        public string RequestId { get; set; }
+        public string? RequestId { get; set; }
 
         public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
     }
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/Error.cshtml b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/Error.cshtml
index a1e04783c67a..10cf32b713d0 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/Error.cshtml
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/Error.cshtml
@@ -6,10 +6,10 @@
 <h1 class="text-danger">Error.</h1>
 <h2 class="text-danger">An error occurred while processing your request.</h2>
 
-@if (Model.ShowRequestId)
+@if (Model?.ShowRequestId ?? false)
 {
     <p>
-        <strong>Request ID:</strong> <code>@Model.RequestId</code>
+        <strong>Request ID:</strong> <code>@Model?.RequestId</code>
     </p>
 }
 
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_Layout.cshtml b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_Layout.cshtml
index 91081c5999c1..ee650191fa28 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_Layout.cshtml
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_Layout.cshtml
@@ -28,7 +28,7 @@
     @*#if (IndividualAuth || OrganizationalAuth)
                     <partial name="_LoginPartial" />
     #elseif (WindowsAuth)
-                    <p class="nav navbar-text">Hello, @User.Identity.Name!</p>
+                    <p class="nav navbar-text">Hello, @User.Identity?.Name!</p>
     #endif*@
                 </div>
             </div>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_LoginPartial.Identity.cshtml b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_LoginPartial.Identity.cshtml
index cd256aa9249f..921dbe1ebc8b 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_LoginPartial.Identity.cshtml
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_LoginPartial.Identity.cshtml
@@ -6,7 +6,7 @@
 @if (SignInManager.IsSignedIn(User))
 {
     <li class="nav-item">
-        <a  class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage">Hello @User.Identity.Name!</a>
+        <a  class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage">Hello @User.Identity?.Name!</a>
     </li>
     <li class="nav-item">
         <form  class="form-inline" asp-area="Identity" asp-page="/Account/Logout" asp-route-returnUrl="@Url.Action("Index", "Home", new { area = "" })">
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_LoginPartial.OrgAuth.cshtml b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_LoginPartial.OrgAuth.cshtml
index da2cbaf70188..74adb1a321ae 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_LoginPartial.OrgAuth.cshtml
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Views/Shared/_LoginPartial.OrgAuth.cshtml
@@ -12,20 +12,20 @@ var options = AzureADB2COptions.Value;
 
 <ul class="navbar-nav">
 @*#if (IndividualB2CAuth)
-@if (User.Identity.IsAuthenticated)
+@if (User.Identity?.IsAuthenticated == true)
 {
         @if (!string.IsNullOrEmpty(options.EditProfilePolicyId))
         {
             <li class="nav-item">
                 <a class="nav-link text-dark" asp-area="MicrosoftIdentity" asp-controller="Account" asp-action="EditProfile">
-                    <span class="text-dark">Hello @User.Identity.Name!</span>
+                    <span class="text-dark">Hello @User.Identity?.Name!</span>
                 </a>
             </li>
         }
         else
         {
             <li class="nav-item">
-                <span class="navbar-text text-dark">Hello @User.Identity.Name!</span>
+                <span class="navbar-text text-dark">Hello @User.Identity?.Name!</span>
             </li>
         }
         <li class="nav-item">
@@ -39,10 +39,10 @@ else
         </li>
 }
 #else
-@if (User.Identity.IsAuthenticated)
+@if (User.Identity?.IsAuthenticated == true)
 {
         <li class="nav-item">
-            <span class="navbar-text text-dark">Hello @User.Identity.Name!</span>
+            <span class="navbar-text text-dark">Hello @User.Identity?.Name!</span>
         </li>
         <li class="nav-item">
             <a class="nav-link text-dark" asp-area="MicrosoftIdentity" asp-controller="Account" asp-action="SignOut">Sign out</a>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/WebApi-CSharp/WeatherForecast.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/WebApi-CSharp/WeatherForecast.cs
index 128b3473696e..7ff35e1a61bc 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/WebApi-CSharp/WeatherForecast.cs
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/WebApi-CSharp/WeatherForecast.cs
@@ -10,6 +10,6 @@ public class WeatherForecast
 
         public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
 
-        public string Summary { get; set; }
+        public string? Summary { get; set; }
     }
 }
diff --git a/src/ProjectTemplates/Web.Spa.ProjectTemplates/Angular-CSharp.csproj.in b/src/ProjectTemplates/Web.Spa.ProjectTemplates/Angular-CSharp.csproj.in
index bd68bc27bc01..c70516484885 100644
--- a/src/ProjectTemplates/Web.Spa.ProjectTemplates/Angular-CSharp.csproj.in
+++ b/src/ProjectTemplates/Web.Spa.ProjectTemplates/Angular-CSharp.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
     <SpaRoot>ClientApp\</SpaRoot>
     <SpaProxyServerUrl Condition="'$(RequiresHttps)' == 'True'">https://localhost:5002</SpaProxyServerUrl>
diff --git a/src/ProjectTemplates/Web.Spa.ProjectTemplates/React-CSharp.csproj.in b/src/ProjectTemplates/Web.Spa.ProjectTemplates/React-CSharp.csproj.in
index 43706ed0b473..5eb953dda24b 100644
--- a/src/ProjectTemplates/Web.Spa.ProjectTemplates/React-CSharp.csproj.in
+++ b/src/ProjectTemplates/Web.Spa.ProjectTemplates/React-CSharp.csproj.in
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>${DefaultNetCoreTargetFramework}</TargetFramework>
+    <Nullable>enable</Nullable>
     <TypeScriptCompileBlocked>true</TypeScriptCompileBlocked>
     <TypeScriptToolsVersion>Latest</TypeScriptToolsVersion>
     <IsPackable>false</IsPackable>
diff --git a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/.template.config/template.json b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/.template.config/template.json
index 1302b3fd2ae5..7249d2e9e6df 100644
--- a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/.template.config/template.json
+++ b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/.template.config/template.json
@@ -25,7 +25,8 @@
         ".template.config/**"
       ],
       "copyOnly": [
-        "wwwroot/**"
+        "wwwroot/**",
+        "ClientApp/package-lock.json"
       ],
       "modifiers": [
         {
diff --git a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/Pages/Error.cshtml.cs b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/Pages/Error.cshtml.cs
index b31bc6addd1f..4c1de861dd12 100644
--- a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/Pages/Error.cshtml.cs
+++ b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/Pages/Error.cshtml.cs
@@ -19,7 +19,7 @@ public ErrorModel(ILogger<ErrorModel> logger)
             _logger = logger;
         }
 
-        public string RequestId { get; set; }
+        public string? RequestId { get; set; }
 
         public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
 
diff --git a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/WeatherForecast.cs b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/WeatherForecast.cs
index 128b3473696e..7ff35e1a61bc 100644
--- a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/WeatherForecast.cs
+++ b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/WeatherForecast.cs
@@ -10,6 +10,6 @@ public class WeatherForecast
 
         public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
 
-        public string Summary { get; set; }
+        public string? Summary { get; set; }
     }
 }
diff --git a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/.template.config/template.json b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/.template.config/template.json
index 0d47ffbc17d5..47ea11d9f615 100644
--- a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/.template.config/template.json
+++ b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/.template.config/template.json
@@ -25,7 +25,8 @@
         ".template.config/**"
       ],
       "copyOnly": [
-        "wwwroot/**"
+        "wwwroot/**",
+        "ClientApp/package-lock.json"
       ],
       "modifiers": [
         {
diff --git a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Pages/Error.cshtml.cs b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Pages/Error.cshtml.cs
index b31bc6addd1f..4c1de861dd12 100644
--- a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Pages/Error.cshtml.cs
+++ b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Pages/Error.cshtml.cs
@@ -19,7 +19,7 @@ public ErrorModel(ILogger<ErrorModel> logger)
             _logger = logger;
         }
 
-        public string RequestId { get; set; }
+        public string? RequestId { get; set; }
 
         public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
 
diff --git a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Pages/Shared/_LoginPartial.cshtml b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Pages/Shared/_LoginPartial.cshtml
index f2884db7adca..8e7fccb5b361 100644
--- a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Pages/Shared/_LoginPartial.cshtml
+++ b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Pages/Shared/_LoginPartial.cshtml
@@ -16,7 +16,7 @@
     @if (SignInManager.IsSignedIn(User))
     {
         <li class="nav-item">
-            <a class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage">Hello @User.Identity.Name!</a>
+            <a class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage">Hello @User.Identity?.Name!</a>
         </li>
         <li class="nav-item">
             <form class="form-inline" asp-area="Identity" asp-page="/Account/Logout" asp-route-returnUrl="/">
diff --git a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/WeatherForecast.cs b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/WeatherForecast.cs
index 128b3473696e..7ff35e1a61bc 100644
--- a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/WeatherForecast.cs
+++ b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/WeatherForecast.cs
@@ -10,6 +10,6 @@ public class WeatherForecast
 
         public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
 
-        public string Summary { get; set; }
+        public string? Summary { get; set; }
     }
 }
diff --git a/src/ProjectTemplates/scripts/.gitignore b/src/ProjectTemplates/scripts/.gitignore
index 6a831906ccc2..ceb08c3caee9 100644
--- a/src/ProjectTemplates/scripts/.gitignore
+++ b/src/ProjectTemplates/scripts/.gitignore
@@ -8,3 +8,8 @@ mvc/
 razor/
 react/
 reactredux/
+web/
+webapp/
+webapi/
+worker/
+grpc/
\ No newline at end of file
diff --git a/src/ProjectTemplates/scripts/Run-WebApi-Locally.ps1 b/src/ProjectTemplates/scripts/Run-WebApi-Locally.ps1
new file mode 100644
index 000000000000..467d6e57e76e
--- /dev/null
+++ b/src/ProjectTemplates/scripts/Run-WebApi-Locally.ps1
@@ -0,0 +1,12 @@
+#!/usr/bin/env pwsh
+#requires -version 4
+
+[CmdletBinding(PositionalBinding = $false)]
+param()
+
+Set-StrictMode -Version 2
+$ErrorActionPreference = 'Stop'
+
+. $PSScriptRoot\Test-Template.ps1
+
+Test-Template "webapi" "webapi" "Microsoft.DotNet.Web.ProjectTemplates.6.0.6.0.0-dev.nupkg" $false
diff --git a/src/ProjectTemplates/scripts/Run-gRPC-Locally.ps1 b/src/ProjectTemplates/scripts/Run-gRPC-Locally.ps1
new file mode 100644
index 000000000000..2803a34d9c9c
--- /dev/null
+++ b/src/ProjectTemplates/scripts/Run-gRPC-Locally.ps1
@@ -0,0 +1,12 @@
+#!/usr/bin/env pwsh
+#requires -version 4
+
+[CmdletBinding(PositionalBinding = $false)]
+param()
+
+Set-StrictMode -Version 2
+$ErrorActionPreference = 'Stop'
+
+. $PSScriptRoot\Test-Template.ps1
+
+Test-Template "grpc" "grpc" "Microsoft.DotNet.Web.ProjectTemplates.6.0.6.0.0-dev.nupkg" $false
diff --git a/src/ProjectTemplates/scripts/Test-Template.ps1 b/src/ProjectTemplates/scripts/Test-Template.ps1
index d35dba4649c8..8cc65f90e2c8 100644
--- a/src/ProjectTemplates/scripts/Test-Template.ps1
+++ b/src/ProjectTemplates/scripts/Test-Template.ps1
@@ -32,18 +32,19 @@ function Test-Template($templateName, $templateArgs, $templateNupkg, $isSPA) {
         $proj = "$tmpDir/$templateName.$extension"
         $projContent = Get-Content -Path $proj -Raw
         $projContent = $projContent -replace ('<Project Sdk="Microsoft.NET.Sdk.Web">', "<Project Sdk=""Microsoft.NET.Sdk.Web"">
-  <Import Project=""$PSScriptRoot/../test/bin/Debug/net6.0/TestTemplates/TemplateTests.props"" />
+  <Import Project=""$PSScriptRoot/../test/bin/Debug/net6.0/TestTemplates/Directory.Build.props"" />
+  <Import Project=""$PSScriptRoot/../test/bin/Debug/net6.0/TestTemplates/Directory.Build.targets"" />
   <PropertyGroup>
     <DisablePackageReferenceRestrictions>true</DisablePackageReferenceRestrictions>
   </PropertyGroup>")
         $projContent | Set-Content $proj
         dotnet.exe ef migrations add mvc
         dotnet.exe publish --configuration Release
-        dotnet.exe bin\Release\net6.0\publish\$templateName.dll
+        Set-Location .\bin\Release\net6.0\publish
+        Invoke-Expression "./$templateName.exe"
     }
     finally {
         Pop-Location
-        Run-DotnetNew "--debug:reinit"
     }
 }