UWP: RelayCommand上的Int参数失败

public class RelayCommand<T> : ICommand
{
    private readonly Action<T> _execute;
    private readonly Func<T, bool> _canExecute;

    public RelayCommand(Action<T> execute, Func<T, bool> canExecute = null)
    {
        _execute = execute;
        _canExecute = canExecute;
    }

    public event EventHandler CanExecuteChanged
    {
        add { CommandManager.RequerySuggested += value; }
        remove { CommandManager.RequerySuggested -= value; }
    }

    public bool CanExecute(object parameter)
    {
        return _canExecute == null || _canExecute((T)parameter);
    }

    public void Execute(object parameter)
    {
        _execute((T)parameter);
    }
}

public class MyViewModel
{
    public ICommand MyCommand { get; }

    public MyViewModel()
    {
        MyCommand = new RelayCommand<int>(ExecuteMyCommand);
    }

    private void ExecuteMyCommand(int parameter)
    {
        // 在这里处理命令的逻辑，可以使用传递的Int参数
    }
}

<Button Content="Click Me" Command="{Binding MyCommand}" CommandParameter="123" />