Convert a String to ASCII

The sample code is a simple function written in C# that converts a given string to it's ASCII value.

Although the function returns a string, the string is actually the ASCII equivalent of the input.

string StringToASCII(string input)
        {
            int asc = 0;
            int i = 0;
            char c;
            for (i = 0; i < input.Length; i++)
            {
                c = input[i];
                asc = asc + input[i];
            }
            return Convert.ToString(asc);
        }