C# 2010 eidt

Jun 11 2012 12:58 PM

In a C#.net 2010 application, I would like a suggestion on how to complete the following task:
In a string field, I need to make certain the only values that are returned by a routine are:
1. alphabetic characters only,
2. The result must be in uppper case,
3. No other characters are allowed.

Can you tell me how to accomplish this task?