What type of locking mechanism does lock statement use

Question

Does the c# lock keyword use a \'yielding\', \'spin-locking\' or hybrid approach to handle contention?

So far my searches on the .net lock statement hasn\'t turned u

Answer 1

lock (obj)
{
}

was just syntactic sugar for Monitor.Enter in a try...finally.

Monitor.Enter(obj);
try
{
}
finally
{
    Monitor.Exit(obj);
}

It is now something a little better (Thanks to Mark and Adriano for keeping me current).

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