C#でデザインパターン「Commandパターン」

using System.ComponentModel;
using System.Windows.Input;

/// <summary>
/// Commandパターンのサンプルコード
/// </summary>
public class Command : ICommand
{
    Action _action;
    public Command(Action action)
    {
        _action = action;
    }
    public event EventHandler? CanExecuteChanged;
    public bool CanExecute(object? parameter) => true;
    public void Execute(object? parameter)
    {
        _action.Invoke();
    }
}
public class ViewModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler? PropertyChanged;
    protected virtual void OnPropertyChanged(string name) => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));

    public Command? MyCommand { get; }

    public ViewModel()
    {
        MyCommand = new Command(()=>
        {
            Console.WriteLine("Call MyCommand!!");
        });
    }

}
static class Program
{
    static public void Main()
    {
        var vm = new ViewModel();

        vm.MyCommand?.Execute(null);
        // Call MyCommand!!
    }
}