Use Collection Expressions

Author: TheCodeTraveler

.editorconfig

@@ -55,6 +55,7 @@ dotnet_style_require_accessibility_modifiers = omit_if_default:warning
 # Suggest more modern language features when available
 dotnet_style_object_initializer = true:suggestion
 dotnet_style_collection_initializer = true:suggestion
+dotnet_style_prefer_collection_expression = when_types_loosely_match:suggestion
 dotnet_style_coalesce_expression = true:suggestion
 dotnet_style_null_propagation = true:suggestion
 dotnet_style_explicit_tuple_names = true:suggestion

sample/ViewModels/BaseViewModel.cs

@@ -12,7 +12,7 @@ protected BaseViewModel(IDispatcher dispatcher)
 		BindingBase.EnableCollectionSynchronization(TopStoryCollection, null, ObservableCollectionCallback);
 	}
 
-	public ObservableCollection<StoryModel> TopStoryCollection { get; } = new();
+	public ObservableCollection<StoryModel> TopStoryCollection { get; } = [];
 
 	protected IDispatcher Dispatcher { get; }
 

sample/ViewModels/NewsViewModel_BadAsyncAwaitPractices.cs

@@ -62,7 +62,7 @@ async Task Refresh(CancellationToken token)
 	// ToDo Refactor
 	async Task<FrozenSet<StoryModel>> GetTopStories(CancellationToken token, int storyCount = int.MaxValue)
 	{
-		List<StoryModel> topStoryList = new();
+		List<StoryModel> topStoryList = [];
 
 		var topStoryIds = await GetTopStoryIDs(token).ConfigureAwait(false);
 

src/AsyncAwaitBestPractices.UnitTests/WeakEventManagerTests/Tests_WeakEventManager_Delegate.cs

@@ -143,7 +143,7 @@ public void WeakEventManagerDelegate_HandleEvent_InvalidHandleEventEventName()
 	public void WeakEventManagerDelegate_HandleEvent_DynamicMethod_ValidImplementation()
 	{
 		//Arrange
-		var dynamicMethod = new System.Reflection.Emit.DynamicMethod(string.Empty, typeof(void), new[] { typeof(object), typeof(PropertyChangedEventArgs) });
+		var dynamicMethod = new System.Reflection.Emit.DynamicMethod(string.Empty, typeof(void), [typeof(object), typeof(PropertyChangedEventArgs)]);
 		var ilGenerator = dynamicMethod.GetILGenerator();
 		ilGenerator.Emit(System.Reflection.Emit.OpCodes.Ret);
 

src/AsyncAwaitBestPractices/WeakEventManager/EventManagerService.shared.cs

@@ -17,7 +17,7 @@ internal static void AddEventHandler(in string eventName, in object? handlerTarg
 			var doesContainSubscriptions = eventHandlers.TryGetValue(eventName, out var targets);
 			if (!doesContainSubscriptions || targets is null)
 			{
-				targets = new List<Subscription>();
+				targets = [];
 				eventHandlers.Add(eventName, targets);
 			}
 
@@ -64,11 +64,11 @@ internal static void HandleEvent(in string eventName, in object? sender, in obje
 				if (eventHandler.IsLightweightMethod())
 				{
 					var method = TryGetDynamicMethod(eventHandler);
-					method?.Invoke(instance, new[] { sender, eventArgs });
+					method?.Invoke(instance, [sender, eventArgs]);
 				}
 				else
 				{
-					eventHandler.Invoke(instance, new[] { sender, eventArgs });
+					eventHandler.Invoke(instance, [sender, eventArgs]);
 				}
 			}
 			catch (TargetParameterCountException e)
@@ -90,11 +90,11 @@ internal static void HandleEvent(in string eventName, in object? actionEventArgs
 				if (eventHandler.IsLightweightMethod())
 				{
 					var method = TryGetDynamicMethod(eventHandler);
-					method?.Invoke(instance, new[] { actionEventArgs });
+					method?.Invoke(instance, [actionEventArgs]);
 				}
 				else
 				{
-					eventHandler.Invoke(instance, new[] { actionEventArgs });
+					eventHandler.Invoke(instance, [actionEventArgs]);
 				}
 			}
 			catch (TargetParameterCountException e)