using System;

using System.Collections.Generic;

using System.Runtime.CompilerServices;

public class Program

{

    public static void Main()

    {

        string helloWorld = null;

        //GuardIsNotNull(helloWorld); //emits "System.ArgumentException: [helloWorld] is null"

        GuardIsNotNull(MethodIDontTrust(2022-1492));

    }

    public static void GuardIsNotNull<T>(T value, [CallerArgumentExpression("value")] string paramName = null) where T : class

    {

        if(value is null)

        {

            throw new ArgumentException($"[{paramName}] is null");

        }

    }

    private static List<int> MethodIDontTrust(int arg)

    {

        return null;

    }

}