change to mvvm Community Toolkit programing pattern

MvvmCommunityApp/viewmodels/MainWindowViewModel.cs

@@ -1,26 +1,21 @@
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace MvvmCommunityApp.viewmodels
 {
-    public class MainWindowViewModel : ObservableObject
+    public partial class MainWindowViewModel : ObservableObject
     {
         public string Title { get; set; }
-        public RelayCommand AddCommand { get; }
 
         public MainWindowViewModel()
         {
             Title = "MyIocName";
             //
-            AddCommand = new RelayCommand(DoAdd);
         }
 
-        private void DoAdd()
+        [RelayCommand]
+        private void Add()
         {
             Console.WriteLine("Do Add");
         }