dotnet Core, 5,0, 6.0 Date parsing with 2 year digits ......... 00-29 => 2000-2229 but 30-99=>1930-1999

Program.cs

using System;
using System.Globalization;

class Program
{
  static void Main(string[] args)
  {
    for (var year = 20; year < 40; year++)
      if (DateTime.TryParseExact($"{year:00}0101", "yyMMdd", CultureInfo.InvariantCulture, DateTimeStyles.None, out var date))
        Console.WriteLine($"[{year:00} = {date.Year:0000}] {year:00}0101 = {date:yyyy.MM.dd}");
  }
}