Code refactoring, added the IRelayCommand interface

Microsoft.Toolkit.Mvvm/Commands/AsyncRelayCommand.cs

@@ -5,7 +5,7 @@
 using System;
 using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
-using System.Windows.Input;
+using Microsoft.Toolkit.Mvvm.Commands.Interfaces;
 using Microsoft.Toolkit.Mvvm.ComponentModel;
 
 namespace Microsoft.Toolkit.Mvvm.Commands
@@ -16,7 +16,7 @@ namespace Microsoft.Toolkit.Mvvm.Commands
     /// action, and providing a <see cref="ExecutionTask"/> property that notifies changes when
     /// <see cref="Execute"/> is invoked and when the returned <see cref="Task{TResult}"/> completes.
     /// </summary>
-    public sealed class AsyncRelayCommand : ObservableObject, ICommand
+    public sealed class AsyncRelayCommand : ObservableObject, IRelayCommand
     {
         /// <summary>
         /// The <see cref="Func{TResult}"/> to invoke when <see cref="Execute"/> is used.
@@ -63,9 +63,7 @@ public Task? ExecutionTask
             private set => SetAndNotifyOnCompletion(ref executionTask, () => executionTask, value);
         }
 
-        /// <summary>
-        /// Raises the <see cref="CanExecuteChanged" /> event.
-        /// </summary>
+        /// <inheritdoc/>
         public void RaiseCanExecuteChanged()
         {
             CanExecuteChanged?.Invoke(this, EventArgs.Empty);

Microsoft.Toolkit.Mvvm/Commands/AsyncRelayCommand{T}.cs

@@ -5,6 +5,7 @@
 using System;
 using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
+using Microsoft.Toolkit.Mvvm.Commands.Interfaces;
 using Microsoft.Toolkit.Mvvm.ComponentModel;
 
 namespace Microsoft.Toolkit.Mvvm.Commands
@@ -16,7 +17,7 @@ namespace Microsoft.Toolkit.Mvvm.Commands
     /// <see cref="Execute(T)"/> is invoked and when the returned <see cref="Task{TResult}"/> completes.
     /// </summary>
     /// <typeparam name="T">The type of parameter being passed as input to the callbacks.</typeparam>
-    public sealed class AsyncRelayCommand<T> : ObservableObject, ICommand<T>
+    public sealed class AsyncRelayCommand<T> : ObservableObject, IRelayCommand<T>
     {
         /// <summary>
         /// The <see cref="Func{TResult}"/> to invoke when <see cref="Execute(T)"/> is used.
@@ -63,9 +64,7 @@ public Task? ExecutionTask
             private set => SetAndNotifyOnCompletion(ref executionTask, () => executionTask, value);
         }
 
-        /// <summary>
-        /// Raises the <see cref="CanExecuteChanged" /> event.
-        /// </summary>
+        /// <inheritdoc/>
         public void RaiseCanExecuteChanged()
         {
             CanExecuteChanged?.Invoke(this, EventArgs.Empty);

Microsoft.Toolkit.Mvvm/Commands/Interfaces/IRelayCommand.cs

@@ -0,0 +1,16 @@
+using System.Windows.Input;
+
+namespace Microsoft.Toolkit.Mvvm.Commands.Interfaces
+{
+    /// <summary>
+    /// An interface expanding <see cref="ICommand"/> with the ability to raise
+    /// the <see cref="ICommand.CanExecuteChanged"/> event externally.
+    /// </summary>
+    public interface IRelayCommand : ICommand
+    {
+        /// <summary>
+        /// Raises the <see cref="ICommand.CanExecuteChanged" /> event.
+        /// </summary>
+        void RaiseCanExecuteChanged();
+    }
+}

Microsoft.Toolkit.Mvvm/Commands/Interfaces/IRelayCommand{T}.cs

@@ -1,12 +1,12 @@
 using System.Windows.Input;
 
-namespace Microsoft.Toolkit.Mvvm.Commands
+namespace Microsoft.Toolkit.Mvvm.Commands.Interfaces
 {
     /// <summary>
-    /// A generic interface representing a more specific version of <see cref="ICommand"/>.
+    /// A generic interface representing a more specific version of <see cref="IRelayCommand"/>.
     /// </summary>
     /// <typeparam name="T">The type used as argument for the interface methods.</typeparam>
-    public interface ICommand<in T> : ICommand
+    public interface IRelayCommand<in T> : IRelayCommand
     {
         /// <summary>
         /// Provides a strongly-typed variant of <see cref="ICommand.CanExecute(object)"/>.

Microsoft.Toolkit.Mvvm/Commands/RelayCommand.cs

@@ -23,7 +23,7 @@
 
 using System;
 using System.Runtime.CompilerServices;
-using System.Windows.Input;
+using Microsoft.Toolkit.Mvvm.Commands.Interfaces;
 
 namespace Microsoft.Toolkit.Mvvm.Commands
 {
@@ -33,7 +33,7 @@ namespace Microsoft.Toolkit.Mvvm.Commands
     /// method is <see langword="true"/>. This type does not allow you to accept command parameters
     /// in the <see cref="Execute"/> and <see cref="CanExecute"/> callback methods.
     /// </summary>
-    public sealed class RelayCommand : ICommand
+    public sealed class RelayCommand : IRelayCommand
     {
         /// <summary>
         /// The <see cref="Action"/> to invoke when <see cref="Execute"/> is used.
@@ -68,9 +68,7 @@ public RelayCommand(Action execute, Func<bool> canExecute)
             this.canExecute = canExecute;
         }
 
-        /// <summary>
-        /// Raises the <see cref="CanExecuteChanged" /> event.
-        /// </summary>
+        /// <inheritdoc/>
         public void RaiseCanExecuteChanged()
         {
             CanExecuteChanged?.Invoke(this, EventArgs.Empty);

Microsoft.Toolkit.Mvvm/Commands/RelayCommand{T}.cs

@@ -23,6 +23,7 @@
 
 using System;
 using System.Runtime.CompilerServices;
+using Microsoft.Toolkit.Mvvm.Commands.Interfaces;
 
 namespace Microsoft.Toolkit.Mvvm.Commands
 {
@@ -33,7 +34,7 @@ namespace Microsoft.Toolkit.Mvvm.Commands
     /// in the <see cref="Execute(T)"/> and <see cref="CanExecute(T)"/> callback methods.
     /// </summary>
     /// <typeparam name="T">The type of parameter being passed as input to the callbacks.</typeparam>
-    public sealed class RelayCommand<T> : ICommand<T>
+    public sealed class RelayCommand<T> : IRelayCommand<T>
     {
         /// <summary>
         /// The <see cref="Action"/> to invoke when <see cref="Execute(T)"/> is used.
@@ -68,9 +69,7 @@ public RelayCommand(Action<T> execute, Func<T, bool> canExecute)
             this.canExecute = canExecute;
         }
 
-        /// <summary>
-        /// Raises the <see cref="CanExecuteChanged" /> event.
-        /// </summary>
+        /// <inheritdoc/>
         public void RaiseCanExecuteChanged()
         {
             CanExecuteChanged?.Invoke(this, EventArgs.Empty);