Using Keyword in C# - Namespace.cs

using System;
using Greeting;
namespace Greeting
{
    public class MorningGreet 
    {
        public void GoodMorning() 
        {
            Console.WriteLine($"Good Morning");
        }
    }
}

public class TestNamespace  
{  
    public static void Main()  
    {  
        MorningGreet morning = new MorningGreet();
        morning.GoodMorning;
  
    }  
}