I have a situation where a block of code should be executed only if two locker objects are free.

I was hoping there would be something like:

lock(a,b)
{
    // this scope is in critical region
} 

However, there seems to be nothing like that. So does it mean the only way for doing this is:

lock(a)
{
    lock(b)
    {
        // this scope is in critical region
    }
}

Will this even work as expected? Although the code compiles, but I am not sure whether it would achieve what I am expecting it to.