Why are there five timer classes in the .Net framework, namely the following:

  1. System.Timers.Timer
  2. System.Threading.Timer
  3. System.Windows.Forms.Timer
  4. System.Web.UI.Timer
  5. System.Windows.Threading.DispatcherTimer

Why are there several versions of the Timer class? And what are the differences between them?

c# .net timer
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