BTDB.KVDBLayer.InMemoryKeyValueDB.StartWritingTransaction C# (CSharp) Method

        public Task<IKeyValueDBTransaction> StartWritingTransaction()
        {
            lock (_writeLock)
            {
                var tcs = new TaskCompletionSource<IKeyValueDBTransaction>();
                if (_writingTransaction == null)
                {
                    NewWrittingTransactionUnsafe(tcs);
                }
                else
                {
                    _writeWaitingQueue.Enqueue(tcs);
                }
                return tcs.Task;
            }
        }

 public void EmptyWritingTransaction()
 {
     using (IKeyValueDB db = new InMemoryKeyValueDB())
     {
         using (var tr = db.StartWritingTransaction().Result)
         {
             tr.Commit();
         }
     }
 }