System.Diagnostics.Stopwatch
namespace System.Diagnostics
{
public class Stopwatch
{
public static readonly long Frequency;
public static readonly bool IsHighResolution;
public TimeSpan Elapsed { get; }
public long ElapsedMilliseconds { get; }
public long ElapsedTicks { get; }
public bool IsRunning { get; }
public Stopwatch();
public static long GetTimestamp();
public void Reset();
public void Restart();
public void Start();
public static Stopwatch StartNew();
public void Stop();
}
}