# CausalClock Methods

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.transactions/orleans.transactions.causalclock/)

## Merge(DateTime) {#merge-system-datetime-5b40bcd6}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.transactions/orleans.transactions.causalclock/methods/merge-system-datetime-5b40bcd6/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Transactions/Utilities/CausalClock.cs#L32-L38)

```csharp
public DateTime Merge(DateTime timestamp)
```

### Parameters

- `timestamp` (`DateTime`)

## MergeUtcNow(DateTime) {#mergeutcnow-system-datetime-3817bd38}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.transactions/orleans.transactions.causalclock/methods/mergeutcnow-system-datetime-3817bd38/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Transactions/Utilities/CausalClock.cs#L41-L47)

```csharp
public DateTime MergeUtcNow(DateTime timestamp)
```

### Parameters

- `timestamp` (`DateTime`)

## UtcNow {#utcnow-8d321fff}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.transactions/orleans.transactions.causalclock/methods/utcnow-8d321fff/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Transactions/Utilities/CausalClock.cs#L23-L29)

```csharp
public DateTime UtcNow()
```