namespace

using System;  
namespace One {  
public class Firstclass 
{  
    public void Hello() 
    { 
        Console.WriteLine("Hello this is myFirst Namespace");
        }  
}  
}  
namespace Two 
{  
    public class Secondclass 
    {  
        public void Hello()
        { 
            Console.WriteLine("Hello this is my Second Namespace"); 
            
        }  
    }  
}  
public class Sample 
{  
    public static void Main()  
    {  
        One .Firstclass h1 = new One .Firstclass();  
        Two.Secondclass  h2 = new Two.Secondclass();  
        h1.Hello();  
        h2.Hello();  
  
    }  
}