App.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
    </startup>
  <runtime>
    <gcServer enabled="true"/>
  </runtime>
</configuration>

Program.cs

using System;
using System.Diagnostics;
using System.Threading;

namespace ConsoleApp10
{
	class Program
	{
		static void Main(string[] args)
		{
			Console.WriteLine($"GCSettings.IsServerGC = {System.Runtime.GCSettings.IsServerGC}");
			Console.WriteLine($"GCSettings.LatencyMode = {System.Runtime.GCSettings.LatencyMode}");
			Console.WriteLine($"GCSettings.LargeObjectHeapCompactionMode = {System.Runtime.GCSettings.LargeObjectHeapCompactionMode}");
			new Thread(() =>
			{
				var timer = new Stopwatch();
				while (true)
				{
					timer.Restart();
					Thread.Sleep(1);
					timer.Stop();
					if (timer.ElapsedMilliseconds > 2) Console.WriteLine($"GC Pause {timer.ElapsedMilliseconds}");
				}
			}).Start();
			var random = new Random();
			new Thread(() =>
			{
				var counter = 0;
				var array = new byte[20000][];
				while (true)
				{
					var bytes = new byte[random.Next(80 * 1024)];
					random.NextBytes(bytes);
					var index = counter % array.Length;// random.Next(array.Length);
					if (index == 0) Console.WriteLine("cycle");
					array[index] = bytes;

					var lohBytes = new byte[90 * 1024];
					if (++counter % 5 == 0) Thread.Sleep(1); // So we don't thrash the CPU!!!!
				}
			}).Start();

			Console.ReadKey();
		}
	}
}