BitSharp.Core.Storage.Memory.MemoryUnconfirmedTxesCursor.TryRemoveTransaction C# (CSharp) Method

        public bool TryRemoveTransaction(UInt256 txHash)
        {
            CheckWriteTransaction();

            UnconfirmedTx unconfirmedTx;
            if (unconfirmedTxes.Value.TryGetValue(txHash, out unconfirmedTx)
                && unconfirmedTxes.TryModify(x => x.Remove(txHash)))
            {
                // update index of txes spending each input's prev tx
                for (var inputIndex = 0; inputIndex < unconfirmedTx.Transaction.Inputs.Length; inputIndex++)
                {
                    var input = unconfirmedTx.Transaction.Inputs[inputIndex];

                    unconfirmedTxesByPrevTxOutputKey.Modify(_ => { });
                    ImmutableDictionary<UInt256, UnconfirmedTx>.Builder unconfirmedTxes;
                    if (unconfirmedTxesByPrevTxOutputKey.Value.TryGetValue(input.PrevTxOutputKey, out unconfirmedTxes))
                        // ensure a copy of the builder is modified or underlying storage will see uncomitted state
                        unconfirmedTxes = unconfirmedTxes.ToImmutable().ToBuilder();
                    else
                        unconfirmedTxes = ImmutableDictionary.CreateBuilder<UInt256, UnconfirmedTx>();

                    unconfirmedTxes.Remove(unconfirmedTx.Hash);
                    if (unconfirmedTxes.Count > 0)
                        unconfirmedTxesByPrevTxOutputKey.Value[input.PrevTxOutputKey] = unconfirmedTxes;
                    else
                        unconfirmedTxesByPrevTxOutputKey.Value.Remove(input.PrevTxOutputKey);
                }

                return true;
            }
            else
                return false;
        }