Apakah ruang nama bersarang dalam C#?

namespace outer {}

namespace inner {
   public class innerClass {
      public void display() {
         Console.WriteLine("Inner Namespace");
      }
   }

}

namespace outer {
   class Program {
      static void Main(string[] args) {
         innerClass cls = new innerClass();
         Console.WriteLine("Welcome!");
         Program.display();
         cls.display();
         Console.ReadLine();
      }

      public static void display() {
         Console.WriteLine("Outer Namespace");
      }
   }

   namespace inner {
      public class innerClass {
         public void display() {
            Console.WriteLine("Inner Namespace");
         }
      }
   }
}