Optimized ICommand.Execute

Author: TheCodeTraveler

Src/AsyncAwaitBestPractices.MVVM.nuspec

@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
   <metadata minClientVersion="2.5">
     <id>AsyncAwaitBestPractices.MVVM</id>
-    <version>3.1.0-pre4</version>
+    <version>3.1.0-pre5</version>
     <title>Task Extensions for MVVM</title>
     <authors>Brandon Minnick, John Thiriet</authors>
     <owners>Brandon Minnick</owners>
@@ -14,14 +14,14 @@
     <summary>Includes AsyncCommand and IAsyncCommand which allows ICommand to safely be used asynchronously with Task.</summary>
     <tags>task,fire and forget, threading, extensions, system.threading.tasks,async,await</tags>
     <dependencies>
-      <dependency id="AsyncAwaitBestPractices" version="3.1.0-pre4" />
+      <dependency id="AsyncAwaitBestPractices" version="3.1.0-pre5" />
     </dependencies>
     <releaseNotes>
       New In This Release:
         - Added `SafeFireAndForgetExtensions.RemoveDefaultExceptionHandling`
         - Fixed InvalidHandleEventException bug when using the incorrect overload for `WeakEventManager&lt;T&gt;.HandleEvent`
         - Fixed NullReferenceException when called `ICommand.Execute`
-        - Lowered .NET Standard Dependency to .NET Standard 1.0
+        - Improved .NET Standard Dependency to .NET Standard 1.0
     </releaseNotes>
     <repository type="git" url="https://github.com/brminnick/AsyncAwaitBestPractices.git" branch="Release-v3.1.0" commit="2ec750b7f1182ee33c60a10705db3cd09c8bddff" />
     <copyright>Copyright (c) 2018 Brandon Minnick</copyright>

Src/AsyncAwaitBestPractices.MVVM/AsyncCommand.cs

@@ -64,16 +64,24 @@ public event EventHandler CanExecuteChanged
 
         void ICommand.Execute(object parameter)
         {
-            if (parameter is T validParameter)
-                ExecuteAsync(validParameter).SafeFireAndForget(_continueOnCapturedContext, _onException);
+            switch (parameter)
+            {
+                case T validParameter:
+                    ExecuteAsync(validParameter).SafeFireAndForget(_continueOnCapturedContext, _onException);
+                    break;
+
 #pragma warning disable CS8601 //Possible null reference assignment
-            else if (parameter is null && !typeof(T).GetTypeInfo().IsValueType)
-                ExecuteAsync((T)parameter).SafeFireAndForget(_continueOnCapturedContext, _onException);
+                case null when !typeof(T).GetTypeInfo().IsValueType:
+                    ExecuteAsync((T)parameter).SafeFireAndForget(_continueOnCapturedContext, _onException);
+                    break;
 #pragma warning restore CS8601
-            else if (parameter is null)
-                throw new InvalidCommandParameterException(typeof(T));
-            else
-                throw new InvalidCommandParameterException(typeof(T), parameter.GetType());
+
+                case null:
+                    throw new InvalidCommandParameterException(typeof(T));
+
+                default:
+                    throw new InvalidCommandParameterException(typeof(T), parameter.GetType());
+            }
         }
     }
 

Src/AsyncAwaitBestPractices.nuspec

@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
   <metadata minClientVersion="2.5">
     <id>AsyncAwaitBestPractices</id>
-    <version>3.1.0-pre4</version>
+    <version>3.1.0-pre5</version>
     <title>Task Extensions for System.Threading.Tasks</title>
     <authors>Brandon Minnick, John Thiriet</authors>
     <owners>Brandon Minnick</owners>