Textbox input validation

Hello all,

I have wrote a small exercise program with 4 text boxes which required user to input y or n

Could someone kindly show me how to do a simple input validation so only y or n are valid responses

Thank you so much

 

if ( x == 'y' || x == 'n' || x == 'Y' || x == 'N' )

 

Hi,

I am new to the C# programming... I am doing one project on WinForms... Based on that knowledge i am suggesting u to try the below code once..