Loops-DecimalToBinary

using System;
using System.Collections.Generic;

/// <summary>
/// Using loops write a program that converts an integer number to its
/// binary representation. The input is entered as long. The output
/// should be a variable of type string.
/// </summary>
public class DecToBin
{
    public static void ConvertToBinary(long input)
    {
        string output = "";
        long result = 0;
        List<string> inputBinary = new List<string>();
        while (input >= 1)
        {
            result = input % 2;
            input /= 2;
            inputBinary.Add(Convert.ToString(result));
        }
        inputBinary.Reverse();
        foreach (var num in inputBinary)
        {
            output += num;
        }
        Console.WriteLine(output);
    }

    static void Main()
    {
        long input = Int64.Parse(Console.ReadLine());

        ConvertToBinary(input);
    }
}