// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002361/guid-isempty

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

        string format = "{0, -50}{1, -10}";

        Guid[] guids = new Guid[]

        {

            Guid.NewGuid(),

            Guid.Empty,

            Guid.NewGuid()

        };

        Console.WriteLine(format, "GUID", "Is Empty");

        Console.WriteLine(format, "----", "--------");

        foreach(var guid in guids)

        {

            // C# Extension Method: Guid - IsEmpty

            Console.WriteLine(format, guid, guid.IsEmpty() ? "True": "False");

        }

    }

}

​