Use pattern matching in TaskExtensions (#4424)

lindexi · web-flow · commit 7fa90f621c0e · 2022-01-03T16:20:23.000+05:30
diff --git a/src/Microsoft.DotNet.Wpf/src/System.Windows.Presentation/System/Windows/Threading/TaskExtensions.cs b/src/Microsoft.DotNet.Wpf/src/System.Windows.Presentation/System/Windows/Threading/TaskExtensions.cs
@@ -16,8 +16,7 @@ public static class TaskExtensions
         /// </summary>
         public static bool IsDispatcherOperationTask(this Task @this)
         {
-            var mapping = @this.AsyncState as DispatcherOperationTaskMapping;
-            return mapping != null;
+            return @this.AsyncState is DispatcherOperationTaskMapping;
         }
         
         /// <summary>

Original file line number	Diff line number	Diff line change
`@@ -16,8 +16,7 @@ public static class TaskExtensions`
`16`	`16`	`/// </summary>`
`17`	`17`	`public static bool IsDispatcherOperationTask(this Task @this)`
`18`	`18`	`{`
`19`		`- var mapping = @this.AsyncState as DispatcherOperationTaskMapping;`
`20`		`- return mapping != null;`
	`19`	`+ return @this.AsyncState is DispatcherOperationTaskMapping;`
`21`	`20`	`}`
`22`	`21`
`23`	`22`	`/// <summary>`