How to remove lowercase on a textbox?

Question

I\'m trying to remove the lower case letters on a TextBox..

For example, short alpha code representing the insurance (e.g., \'BCBS\' for \'Blue Cross B

Answer 1

string caps = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

string.Join("",
   "Blue Cross Blue Shield".Select(c => caps.IndexOf(c) > -1 ? c.ToString() : "")
                           .ToArray());