Parsing a word

Something like this perhaps:

       int[] numLetters = new int[26];
       string temp = textBox1.Text.ToUpper();
       for(int i = 0; i < temp.Length; i++)
       {
          char c = temp[i];
          int alpha = (int)c - 65; // A is 65
          Console.WriteLine(alpha);
          numLetters[alpha]++;
       }
       string result = textBox1.Text + " contains the following letters \r\n";
       for (int i = 0; i < 26; i++)
       {
          if (numLetters[i] > 0)
          {
             result += "\r\n  " + (char)(i + 65)  + " x " + numLetters[i];
          }
       }
       MessageBox.Show(result);