MembersMustExist : Member 'System.Threading.ThreadPool.QueueUserWorkItem<TState>(System.Action<TState>, TState, System.Boolean)' does not exist in the implementation but it does exist in the contract.
MembersMustExist : Member 'System.Threading.ThreadPool.UnsafeQueueUserWorkItem<TState>(System.Action<TState>, TState, System.Boolean)' does not exist in the implementation but it does exist in the contract.