// Write a program to print the binary format of a number

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

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            int num;
            Console.Write("Enter a Number : ");
            num = int.Parse(Console.ReadLine());
            int quot;

            string rem = "";

            while (num >= 1)
            {
                quot = num / 2;
                rem += (num % 2).ToString();
                num = quot;
            }

            // Reversing the  value
            string bin = "";
            for (int i = rem.Length - 1; i >= 0; i--)
            {
                bin = bin + rem[i];

            }

            Console.WriteLine("The Binary format for given number is {0}", bin);


            Console.Read();

        }
    }
}

Methods in CSharp

//Using Methods(Example)

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

namespace CSharpConsole
{
    class Method_ex
    {

        //Non value returning method without parameter
        public void Test1()
        {
            int m = 5;
            for (int i = 1; i <= 10; i++)
                Console.WriteLine("{0}*{1}={2}", m, i, m * i);
        }
        // Non value returning method with parameters
        public void Test2(int m, int n)
        {
            for (int i = 1; i <= n; i++)
                Console.WriteLine("{0}*{1}={2}", m, i, m * i);
 
        }
        //value returning method with out parameters
        public string Test3()                  //Static action
        {
            string str = ("Hello Leena");
            str = str.ToUpper();
            return str;
        }
        //value returning method with parameters
        
           
        public string Test4(string str)       
        {                        
            str = str.ToUpper();             //Dynamic Action
            return str;
        }
            
     static void Main(string[] args)
      {
         Method_ex m=new Method_ex();

        //calling non-value returning methods
         m.Test1();
         m.Test2(7,20);
        //Calling value returning methods
         string str=m.Test3();
         Console.WriteLine(str);
         Console.WriteLine(m.Test4("leena"));
         Console.ReadLine();     
         
      }
    }
}