using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        IncorrectNullOperatorUse(null);

        try

        {

            IncorrectCoalesceOperatorUse(null);

        }

        catch

        {

            Console.WriteLine("IncorrectCoalesceOperatorUse failed.");

        }

    }

​

​

    public static void IncorrectNullOperatorUse(List<string> list)

    {

        if (list?.Count <= 0)

        {

            Console.WriteLine("There is no data to process...");

            return;

        }

​

        Console.WriteLine("Try to process the data");

    }

    public static void IncorrectCoalesceOperatorUse(object textValue)

    {

        var labelText = textValue.ToString() ?? "No Value";

​

        Console.WriteLine(labelText);

    }

}