Get the alphabet by looping through the ASCII values 65 to 90, which correspond to uppercase A through Z.

1. protected void GetAlphabet()
2. {
3.     string strAlpha = "";
4.     for (int i = 65; i <= 90; i++) // Loop through the ASCII characters 65 to 90
5.     {
6.         strAlpha += ((char)i).ToString() + " "; // Convert the int to a char to get the actual character behind the ASCII code
7.     }
8. }