Environment.TickCount is not enough

Environment.TickCount is not enough

- Environment.TickCount will overflow after approximately 25 days, because the return value is a 32-bit integer.

- https://stackoverflow.com/questions/756462/elapsed-time-with-environment-tickcount-avoiding-the-wrap

Use Stopwatch

Stopwatch mStopwatch = new Stopwatch();

mStopwatch.Start();

long elapsedMs = mStopwatch.ElapsedMilliseconds;

- https://stackoverflow.com/questions/4645171/environment-tickcount-is-not-enough/4645208

Use GetTickCount64

This function does the same as GetTickCount but returns the result as a 64 bit integer.

Please note that the function result wraps to 0 after about 584 million years.

- http://www.on-time.com/rtos-32-docs/rtkernel-32/programming-manual/alternate-apis-for/win32/gettickcount64.htm

- https://docs.microsoft.com/ko-kr/windows/desktop/api/sysinfoapi/nf-sysinfoapi-gettickcount64

using System.Runtime.InteropServices;

...

[DllImport("kernel32.dll") ]

public static extern UInt64 GetTickCount64();

...

var tickCount64 = GetTickCount64();