C# OO - Interface

Program.cs

using System;

namespace LearnCS
{
    interface IPrim
    {
        void IPrimPrint();        
    }

    class Sec : IPrim
    {
        public void IPrimPrint()
        {
            Console.WriteLine("Body of Method must be in Sec Class");
        }        
    }

    class Program
    {
        static void Main(string[] args)
        {
            Sec p1 = new Sec();
            p1.IPrimPrint();            

            Console.ReadLine();
        }
    }
}