Can Execute(Object) Method
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Returns a Boolean indicating if the Command can be exectued with the given parameter.
public bool CanExecute (object parameter);
abstract member CanExecute : obj -> bool override this.CanExecute : obj -> bool
true if the Command can be executed,
If no canExecute parameter was passed to the Command constructor, this method always returns
If the Command was created with non-generic execute parameter, the parameter of this method is ignored.