using System;
using System.IO;
using System.Xml.Serialization;

namespace Net5Sandbox
{
    public class XmlRoot
    {
        public int Id { get; set; }
    }

    class Program
    {
        static string Serialize(XmlRoot dataObj)
        {
            //var serializer = new XmlSerializer(typeof(XmlRoot)); //doesn't leak
            var serializer = XmlSerializer.FromTypes(new[] { typeof(XmlRoot) })[0]; //leaks
            using (var stream = new StringWriter())
            {
                serializer.Serialize(stream, dataObj);
                return stream.ToString();
            }
        }


        static void Main(string[] args)
        {
            const int repeatCount = 10000;

            var totalLength = 0L;
            var dataObj = new XmlRoot { Id = 1 };
            for (int i = 0; i < repeatCount; i++)
            {
                totalLength += Serialize(dataObj).Length;
            }

            Console.WriteLine($"Done total length = {totalLength}");

            Console.WriteLine(GC.GetTotalMemory(false));
            Console.WriteLine("Running GC");
            for (int i = 0; i < 10; i++)
            {
                GC.Collect(2, GCCollectionMode.Forced, true, true);
            }
            Console.WriteLine("Done");
            Console.WriteLine(GC.GetTotalMemory(false));
            Console.ReadKey();
        }
    }
}