在没有命令的情况下在ViewModel中调用方法

I have the following scenario:

我有以下情况：

public class MyCommand : ICommand
{
    MyViewModel _viewModel;

    public MyCommand(MyViewModel viewModel)
    {
        _viewModel = viewModel;
    }

    public bool CanExecute(object parameter)
    {
        return true;
    }

    public event EventHandler CanExecuteChanged;

    public void Execute(object parameter)
    {
        _viewModel.SomeMethod();
    }
}
publ