Does a locked object stay locked if an exception occurs inside it?

Question

In a c# threading app, if I were to lock an object, let us say a queue, and if an exception occurs, will the object stay locked? Here is the pseudo-code:

in         


        

Answer 1

yes, that will release properly; lock acts as try/finally, with the Monitor.Exit(myLock) in the finally, so no matter how you exit it will be released. As a side-note, catch(... e) {throw e;} is best avoided, as that damages the stack-trace on e; it is better not to catch it at all, or alternatively: use throw; rather than throw e; which does a re-throw.

If you really want to know, a lock in C#4 / .NET 4 is:

{
    bool haveLock = false;
    try {
       Monitor.Enter(myLock, ref haveLock);
    } finally {
       if(haveLock) Monitor.Exit(myLock);
    }
}