Use File-Scoped Namespaces and Global Implicit Usings

.editorconfig

@@ -253,6 +253,9 @@ csharp_space_between_square_brackets = false
 # https://docs.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/formatting-rules#wrap-options
 csharp_preserve_single_line_statements = false
 csharp_preserve_single_line_blocks = true
+# Namespace options
+# https://docs.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/formatting-rules#namespace-options
+csharp_style_namespace_declarations = file_scoped:warning
 
 ##########################################
 # .NET Naming Rules
@@ -452,4 +455,4 @@ dotnet_naming_rule.parameters_rule.severity             = warning
 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 # OTHER DEALINGS IN THE SOFTWARE.
-##########################################
+##########################################

.git-blame-ignore-revs

@@ -0,0 +1,4 @@
+# file-scoped namespaces and global usings
+5528a2923ccc63d776c91994b0b17a2c3ad5be94
+d14c82023fc01a6fca99c42212cb3c97991fae9e
+0e9a066195a100ae56b4ca49cee9927fb15e1482

README.md

@@ -77,6 +77,12 @@ To clone ImageSharp locally, click the "Clone in [YOUR_OS]" button above or run
 git clone https://github.com/SixLabors/ImageSharp
 ```
 
+Then set the following config to ensure blame commands ignore mass reformatting commits.
+
+```bash
+git config blame.ignoreRevsFile .git-blame-ignore-revs
+```
+
 If working with Windows please ensure that you have enabled long file paths in git (run as Administrator).
 
 ```bash

SixLabors.ImageSharp.props

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+
+  <!--Add common namespaces to implicit global usings if enabled.-->
+  <ItemGroup Condition="'$(ImplicitUsings)'=='enable' OR '$(ImplicitUsings)'=='true'">
+    <Using Include="SixLabors.ImageSharp" />
+    <Using Include="SixLabors.ImageSharp.PixelFormats" />
+    <Using Include="SixLabors.ImageSharp.Processing" />
+  </ItemGroup>
+
+</Project>