Question

If I have the following code:

lock(SyncRoot){ return value; }

Will the SyncRoot be unlocked before the return statement?

I tried walking through the code in VS2005, but it doesn’t actually show one way or another. It looks like it DOES unlock it, but I want to make sure.

Answer 1

Yes it does unlock no matter how you exit the block (i.e. return, break, throw, etc).

See MSDN – lock statement for more details:

The lock keyword ensures that one thread does not enter a critical section of code while another thread is in the critical section.
…
The lock keyword calls Enter at the start of the block and Exit at the
end of the block.