Check out example codes for "c# contextswitchdeadlock". It will help you in understanding the concepts better.

Code Example 1

The ContextSwitchDeadlock doesn't necessarily mean your code has an issue, 
just that there is a potential issue. 
If you go to Debug > Exceptions in the menu and expand the 
Managed Debugging Assistants, you will find ContextSwitchDeadlock is enabled. 
If you disable this, VS will no longer warn you when items are taking a 
long time to process. In some cases you may validly have a long-running 
operation. It's also helpful if you are debugging and have stopped on a line 
while this is processing - you don't want it to complain before you've had 
a chance to dig into an issue.

It may also be an issue where no match is being found in a database search 

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