Maybe it's a simple quiestion but i realy don't know how to solve it... i've searched on google bu i did not find any clue how can i check the MaskedTextBox...

I have put the mask "##/##/####" (to serve as a date input) and i dont know how can i check this do not be empty... i have tried "__/__/____" and also " / / " and "##/##/####" but nothings working...

Thanks in advice...