Converting a String to Uppercase or Lowercase

You can use the ToLower and ToUpper methods of the string type to convert a particular string to all lowercase or all uppercase.  In either case, a new string is returned.

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string peye = "Guy Noir";   string peyeLower = peye.ToLower(); string peyeUpper = peye.ToUpper();   Console.WriteLine(peye); Console.WriteLine(peyeLower); Console.WriteLine(peyeUpper);

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