ClockResolution.cs

using System.Runtime.InteropServices;

namespace ClockResolution
{
    public struct TimerResolution
    {
        public double periodMin;
        public double periodMax;
        public double periodCurrent;
    }

    public static class WindowsAPI
    {
        [DllImport("ntdll.dll", SetLastError = true)]
        private static extern int NtQueryTimerResolution(out uint MaximumResolution, out uint MinimumResolution, out uint CurrentResolution);

        public static TimerResolution queryTimerResolution()
        {
            NtQueryTimerResolution(out uint max, out uint min, out uint current);
            return new TimerResolution()
            {
                periodMin = min / 10000D,
                periodMax = max / 10000D,
                periodCurrent = current / 10000D
            };
        }
    }
}