System.Threading.SynchronizationLockException: The current thread has not entered the lock in read mode
  at System.Threading.ReaderWriterLockSlim.ExitReadLock () [0x00000] in <filename unknown>:0
  at System.Web.HttpApplicationState.Get (System.String name) [0x00000] in <filename unknown>:0
  at System.Web.HttpApplicationState.get_Item (System.String name) [0x00000] in <filename unknown>:0
  at DotNetOpenAuth.OpenId.RelyingParty.OpenIdRelyingParty.get_HttpApplicationStore () [0x00000] in <filename unknown>:0
  at DotNetOpenAuth.OpenId.RelyingParty.OpenIdRelyingParty..ctor () [0x00000] in <filename unknown>:0