using System;

public class Program

{

    public static void Main()

    {

        //var good = (string)null;

        //var good = "ssss";

        var good = "012345678901234567890123456789012345678901234567890123456789";

        var results = good?.Substring(0, Math.Min(good?.Length ?? 0, 50));

        results?.Dump();

        results?.Length.Dump();

    }

}