using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(ConvertToBase(2176,2));

    }

    public static String ConvertToBase(int num, int nbase)

    {

    String chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";

​

    // check if we can convert to another base

    if(nbase < 2 || nbase > chars.Length)

        return "";

​

    int r = 0;

    String newNumber = "";

​

    // in r we have the offset of the char that was converted to the new base

    while(num >= nbase)

    {

        r = num % nbase;

        newNumber = chars[r] + newNumber;

        num = num / nbase;

    }

    // the last number to convert

    newNumber = chars[num] + newNumber;

    //return num.ToString();

    return newNumber;

    }

    public static string DecimalParaBinario(string numero) 

    {

        string valor = "";

        int dividendo = Convert.ToInt32(numero);

        if (dividendo == 0 || dividendo == 1)

        {

            return Convert.ToString(dividendo);

        }

        else

        {

            while (dividendo > 0)

            {

                valor += Convert.ToString(dividendo % 2);

                dividendo = dividendo / 2;

            }

        }

        return InverterString(valor);

    }

    public static string InverterString(string str)

    {

        int tamanho = str.Length;

        char[] caracteres = new char[tamanho];

        for (int i = 0; i < tamanho; i++)

        {

            caracteres[i] = str[tamanho - 1 - i];

        }

        return new string(caracteres);

    }

}

​

​