13 Binary to Decimal Number

gistfile1.txt

using System;
class Program
{
    private static string input;
    public static void ConvertBinToDecimal (string input)
    {
        int decimalNum = 0;
        for (int i = 0; i < input.Length; i++)
        {
            char temp = input[input.Length-i-1];
            int ch = Convert.ToByte(temp)-48;
            decimalNum += ch*(int)Math.Pow(2, i);
        }
        Console.WriteLine(decimalNum);
    }
    static void Main()
    {
        input = Console.ReadLine();
        ConvertBinToDecimal(input);
    }
}