Randomly clearing the clipboard is a
great way to get your application blocked as "malware"!
I suspect this is actually an
XY problem[
^] - you're asking for help to implement the solution you
think you need, rather than help solving the actual problem.
If you're writing code which (ab)uses the clipboard to transfer sensitive data, and you're trying to avoid having that data stored in the Windows 10+ clipboard history / roaming clipboard, you'll need to call
Clipboard.SetContentWithOptions[
^] to copy the data, rather than simply using the
Clipboard
class.
It's a WinRT method, so it's not particularly simple to call from an unpackaged .NET Framework app. But with a little reflection, it's doable:
Windows 10 Clipboard Utilities · GitHub[
^]
If that's
not what you're doing, then you're going to need to provide a clearer explanation of the problem.