1/// <summary>

2/// Checks to see whether or not a Char is Numeric

3/// </summary>

4/// <param name="numericChar">The Char to check</param>

5/// <returns>True if numeric, False if not</returns>

6public static bool IsCharNumeric(char numericChar)
7{
8    int charCode = Convert.ToInt32(numericChar);
9    if (charCode > 47 && charCode < 58)
10        return true;
11    else
12        return false;
13}

bool isNumeric = IsCharNumeric('1'); // returns true
bool isNumeric = IsCharNumeric('a'); // returns false