Question

I am developing a windows form application in .net c#, All I want to know is how to validate the Indian phone number, if a user inputs in a textbox.

Answer 1

You can make use of Regular expression
e.g.

Regex rx = new Regex(@"^((\+){0,1}91(\s){0,1}(\-){0,1}(\s){0,1}){0,1}9[0-9](\s){0,1}(\-){0,1}(\s){0,1}[1-9]{1}[0-9]{7}$");

and than you can use rx.IsMatch to validate the input string.