Global keyword in C#

The global contextual keyword, when it comes before the :: operator, refers to the global namespace, which is the default namespace for any C# program and is otherwise unnamed.

namespace ConsoleKeyword

{

    class System

    {

        System()

        {

        }

        static void Main(string[] args)

        {

           System.Console.WriteLine("Amit");

        }

    }

}

Whenever you compiled this program you will be get an error like Error 1  'ConsoleKeyword.System' does not contain a definition for 'Console'

In this case we the global keyword to differentiate the class name System and namespace name System.

namespace ConsoleKeyword

{

    class System

    {

        System()

        {

        }

        static void Main(string[] args)

        {

            global :: System.Console.WriteLine("Amit");

            global :: System.Console.ReadKey(true);

        }

    }

}

Output