Programmatically raise a command

I have a button:

<Button x:Name="MyButton" Command="SomeCommand"/>

Is there a way to execute the command from source? Calling the click on the button does not help:

MyButton.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));

I mean - this does raise the event, but it does not raise the command. Is there something similar to this RaiseEvent but just for Command? If there is not - how can I instantiate ExecutedRoutedEventArgs? Is it possible?

Lastly - please do not tell me how to avoid calling the command.