Loops-BinaryToDecimal

using System;

/// <summary>
/// Using loops write a program that converts a binary integer number
/// to its decimal form. The input is entered as string. The output
/// should be a variable of type long. Do not use the built-in .NET
/// functionality.
/// </summary>
public class BinToDec
{
    public static void ConvertBinToDec(string input)
    {
        string[] inputArr = new string[input.Length];
        double inputDecimal = 0;

        // Fill the inputArr array. Since string as like an array of chars it's rather easy
        for (int i = 0; i < input.Length; i++)
        {
            inputArr[i] = char.ToString(input[i]);
            if (int.Parse(inputArr[i]) != 0 && int.Parse(inputArr[i]) != 1)
            {
                // If the input is invalid (e.g. 5) you will be prompted to re-enter valid input.
                Console.WriteLine("Invalid Input! Try again: ");
                Main();
            }
        }

        // Array is reversed to prevent trailing zeroes at the beginning to increment the
        // power we use in the calculation.
        Array.Reverse(inputArr);

        for (int i = 0; i < inputArr.Length; i++)
        {
            inputDecimal += double.Parse(inputArr[i]) * Math.Pow(2, i);
        }

        Console.WriteLine(inputDecimal);
    }

    static void Main()
    {
        string input = Console.ReadLine();

        ConvertBinToDec(input);
    }
}