C# global namespace

namespace N/*from  w  ww .  jav a 2  s.com*/
{
    class A
    {
        static void Main()
        {
            new A.B();
            new global::A.B();
        }
        public class B { }
    }
}
namespace A
{
    class B { }
}

using System;  /*from ww  w  .  j av  a2  s.  c o  m*/
  
using Ctr = Counter;  
 
namespace Counter {  
  class MyClass {  
  }  
}  
  
// Declare another class called CountDown, which  
// is in the global namespace.  
class MyClass { 
} 
 
class GlobalAliasQualifierDemo {  
  public static void Main() {  
 
    Ctr::MyClass m = new Ctr::MyClass();  
 
    // Next, create CountDown object from global namespace. 
    global::MyClass m2 = new global::MyClass();  
  }  
}