Question

In C# is there a way to detect if a string is all caps?

Most of the strings will be short(ie under 100 characters)

Answer 1

No need to create a new string:

bool IsAllUpper(string input) {     for (int i = 0; i < input.Length; i++)     {         if (!Char.IsUpper(input[i]))              return false;     }      return true; } 

Edit: If you want to skip non-alphabetic characters (The OP’s original implementation does not, but his/her comments indicate that they might want to) :

   bool IsAllUpper(string input)     {         for (int i = 0; i < input.Length; i++)         {             if (Char.IsLetter(input[i]) && !Char.IsUpper(input[i]))                 return false;         }         return true;     }