Weird typewriter sound as I type into a textbox (wpf) in C# -

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i've made pretty simple wpf windows textbox in it. type in it gives me weird typewriter-sound. idea why? , how can stop doing it?

as there no built-in functionality in wpf automatically generate weird typewriter sound in text boxes, have 2 choices:

  1. remove code have in text changed event plays weird typewriter sound.
  2. make sure don't have third party applications generates weird typewriter sounds on system.

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