Binary To Decimal Number Converter

using System;
using System.Collections.Generic;
using System.Linq;

class BinaryToDecimalNum
{
  static void Main()
  {
    //Write a program to convert binary numbers to their decimal representation.

    string numberToConvert = Console.ReadLine();//Read the input from the console
    Console.WriteLine(ConvertBinaryToDecimal(numberToConvert));
  }

  static int ConvertBinaryToDecimal(string number) //Converts the number from binary to decimal numeral system
  {
    List<int> numberAsDigits = new List<int>(); //List to store the digits of our number
    int decimalNumber = 0; //The result number
    bool isNegativeNum = false;

    foreach (char digit in number)//Output the digits from the string into the list
    {
      numberAsDigits.Add((digit - '0'));
    }

    if (numberAsDigits.Count == 32 && numberAsDigits[0] == 1) //Check if the binary number is negative(i.e. the 32nd position is 1 from signed magnitude theory)
    {
      isNegativeNum = true; //Indicate that it is negative
      numberAsDigits.RemoveAt(0); //Remove from the list the 32nd position (0 in the list index)
    }
    for (int i = numberAsDigits.Count - 1, power=0 ; i >= 0; i--, power++) //Do the maths by the formula
    {
      decimalNumber += numberAsDigits[i]*(int)(Math.Pow(2,power));
    }
    if (isNegativeNum== true)//Go back to see if we need a minus sign
    {
      decimalNumber *= -1;//Add the minus sign
    }
    return decimalNumber;
  }
}