Quick test of system timer frequency vs. Environment.TickCount in .NET

Program.cs

using System;

namespace ConsoleApp3
{
    public class Program
    {
        public void Main(string[] args)
        {
            var length = TimeSpan.FromSeconds(2);
            var started = DateTime.UtcNow;
            var lastTickCount = Environment.TickCount;
            var lastNow = DateTime.UtcNow;

            while (DateTime.UtcNow - started < length)
            {
                var tickCount = Environment.TickCount;
                var now = DateTime.UtcNow;

                if (lastTickCount != tickCount)
                {
                    Console.WriteLine($"Environment.TickCount changed: +{tickCount - lastTickCount}ms");
                }

                var diff = now - lastNow;
                if (diff.Ticks > 0)
                {
                    Console.WriteLine($"DateTime.UtcNow changed: +{diff.TotalMilliseconds}ms");
                }

                lastTickCount = tickCount;
                lastNow = now;
            }

            Console.WriteLine();
            Console.WriteLine($"INFO: {TimeSpan.TicksPerMillisecond} TimeSpan ticks / ms");
        }
    }
}