# PendingTransactionState<TState>.SequenceId

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.transactions/orleans.transactions.abstractions.pendingtransactionstate-1/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.transactions/orleans.transactions.abstractions.pendingtransactionstate-1/properties/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Transactions/Abstractions/ITransactionalStateStorage.cs)

```csharp
[Orleans.Id(0)]
public long SequenceId
```

Transactions are given dense local sequence numbers 1,2,3,4... If a new transaction is prepared with the same sequence number as a previously prepared transaction, it replaces it.