TimerUtil.cs

using System.Runtime.InteropServices;
using System.Security;

namespace com.bfx.timerutil {

/// <summary> Tools to enable high-resolution timer (1ms). Default timer resolution is 16ms.</summary>
/// Note, that only the resolution of Thread.Sleep() is increased. Task.Delay() is not affected by this
/// increased resolution since the responsible timer is running at fixed 16m rate.
public static class TimerUtil {

    private static bool enabled;

/// <summary> Enables high-resolution timer (1ms)</summary>
public static void EnableHighresTimer() {
    if(!enabled) {
        TimeBeginPeriod(1/*ms*/);
        enabled = true;
    } 
}

/// <summary> Disables high-resolution timer (1ms)</summary>
public static void DisableHighresTimer() {
    if(enabled) {
        TimeEndPeriod(1/*ms*/);
        enabled = false;
    } 
}

#region native-api        

        /// <summary> native TimeBeginPeriod() from Windows API.</summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Interoperability", "CA1401:PInvokesShouldNotBeVisible"),
         System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2118:ReviewSuppressUnmanagedCodeSecurityUsage"), SuppressUnmanagedCodeSecurity]
        [DllImport("winmm.dll", EntryPoint="timeBeginPeriod", SetLastError=true)]
        private static extern uint TimeBeginPeriod(uint uMilliseconds);

        /// <summary> native TimeEndPeriod() from Windows API.</summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Interoperability", "CA1401:PInvokesShouldNotBeVisible"),
         System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2118:ReviewSuppressUnmanagedCodeSecurityUsage"), SuppressUnmanagedCodeSecurity]
        [DllImport("winmm.dll", EntryPoint="timeEndPeriod", SetLastError=true)]
        private static extern uint TimeEndPeriod(uint uMilliseconds);
    }
#endregion native-api       
}