DelegateCommand

Implementation of ICommand where the Execute and CanExecute callbacks are handled by delegates.

public IDelegateCommand AddItems { get; }

public TestViewModel()
{
    AddItems = DelegateCommand.Create(OnAddItems);
}

private void AddItemsImpl()
{
    Debug.WriteLine("Hello");
}

DelegateCommand With Parameter and CanExecute

private IDelegateCommand CommandWithCanExecute { get; }
CommandWithCanExecute = DelegateCommand.Create(OnSimpleCommand, CanExecuteCommandWithCanExecute);

private bool CanExecuteCommandWithCanExecute()
{
    return true;
}

private void OnSimpleCommand()
{
    
}

Command with Paramter

private IDelegateCommand CommandWithParameter { get; }
CommandWithParameter = DelegateCommand.Create(OnCommandWithParameter, CanExecuteCommandWithParameter);

private bool CanExecuteCommandWithParameter(object? parameter)
{
    return true;
}

private void OnCommandWithParameter(object? parameter)
{
    
}

NOTE

you can use IDelegateCommand Instead of ICommand

Demo

you can run demo and see this feature.