HexDecimal Char to Integer - a small function

HexDecimalCharToInteger1.cs

/*
 Get an integer value from HexDecimal char 
 For example, 'F', return value is 15
              '9', return value is 9
*/
public static int getInt(char c)
        {
            int number = c - '0';
            if (number >= 0 && number <= 9)
                return number;
            else
            {
                string charStr = "ABCDEF";
                char[] charArr = charStr.ToCharArray();
                int value = Array.IndexOf(charArr, c);
                return 10 + value;
            }
        }