using System;

public class Program

{

    public static void Main()

    {

        var item = default(ComplexType);

        if(item == null){

            Console.WriteLine("its null");

        }

        else{

        item.Test = "test";

        Console.WriteLine(item.Test);

        }

    }

    public class ComplexType

    {

        public string Test {get;set;}

    }

}