gistfile1.txt

using System;
using System.Collections.Generic;
using System.Threading;

namespace RWLockSlimTest
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            ReaderWriterLockSlim rwlock = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);

			rwlock.EnterWriteLock ();
			rwlock.EnterUpgradeableReadLock ();
			rwlock.ExitUpgradeableReadLock ();
			rwlock.ExitWriteLock ();

			/* The next statement fails with
			Unhandled Exception: System.Threading.LockRecursionException: In read mode you can just enter Read recursively
			  at System.Threading.ReaderWriterLockSlim.CheckRecursionAuthorization (LockState ctstate, LockState desiredState) [0x00000] in <filename unknown>:0 
			  at System.Threading.ReaderWriterLockSlim.CheckState (System.Threading.ThreadLockState state, Int32 millisecondsTimeout, LockState validState) [0x00000] in <filename unknown>:0 
			  at System.Threading.ReaderWriterLockSlim.TryEnterWriteLock (Int32 millisecondsTimeout) [0x00000] in <filename unknown>:0 
			  at System.Threading.ReaderWriterLockSlim.EnterWriteLock () [0x00000] in <filename unknown>:0 
			  at RWLockSlimTest.MainClass.Main (System.String[] args) [0x00000] in <filename unknown>:0			
			*/
			rwlock.EnterWriteLock ();
			
			//rwlock.ExitWriteLock ();
        }
    }
}