Why PeriodicTimer is superior to System.Threading.Timer and while(true) await Task.Delay() in C#:

• Task.Delay() does not account for execution duration, causing timer drift over time.
• System.Threading.Timer fires callbacks on threadpool threads, causing overlapping executions if work takes longer than the interval.

The Modern Solution:

using PeriodicTimer timer = new PeriodicTimer(TimeSpan.FromSeconds(10));
while (await timer.WaitForNextTickAsync(cancellationToken))
{
    await ExecuteHeartbeatAsync(); // Guarantees no overlapping ticks!
}

PeriodicTimer is one of the cleanest additions to modern .NET async programming. Clean cancellation and zero timer drift.

Handles disposal and cancellation gracefully without leaking timer handles.