// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002577/object-referenceequals

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

        string  thisNull = null;

​

        // C# Extension Method: Object - ReferenceEquals

        bool result1 = thisNull.ReferenceEquals(null); // return true;

        bool result2 = thisNull.ReferenceEquals(""); // return false;

​

        Console.WriteLine(result1);

        Console.WriteLine(result2);

    }

}