ExampleMVVM.cs

public class ViewModel : ViewModelBase
{
    public ICommand ChangeNameCommand { get; }
    ...
}

public class DelegateCommand : ICommand
{
    private readonly Action<object> _executeAction;

    public DelegateCommand(Action<object> executeAction)
    {
        _executeAction = executeAction;
    }

    public void Execute(object parameter) => _executeAction(parameter);

    public bool CanExecute(object parameter) => true;

    public event EventHandler CanExecuteChanged;
}