# Understanding User and Kernel Mode

**URL:** <https://discourse.codinghorror.com/t/understanding-user-and-kernel-mode/405>\
**Category:** blog\
**Created:** [January 3, 2008, 12:00am UTC](https://discourse.codinghorror.com/t/understanding-user-and-kernel-mode/405 "2008-01-03T00:00:00Z")\
**Posts on this page:** 1\
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**Author:** ![gogole](https://discourse-cdn.codinghorror.com/letter_avatar_proxy/v2/letter/g/a587f6/32.png) [@gogole](https://discourse.codinghorror.com/u/gogole)\
**Post date:** [January 4, 2008, 12:00am UTC](https://discourse.codinghorror.com/t/understanding-user-and-kernel-mode/405/17 "2008-01-04T00:00:00Z")

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So… you think that exceptions in .NET involve the CPU executing in kernel mode?

i’m not sure but it seems reasonable enough to be true ,possibly some of the .Net libraries are used in low level OS [operations.Is](http://operations.Is) this true?

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