# CachedMessageExtensions.CompareStreamId(CachedMessage, StreamId)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.cachedmessageextensions/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.cachedmessageextensions/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Streaming/Common/PooledCache/CachedMessage.cs#L69)

```csharp
public static bool CompareStreamId(this ref CachedMessage cachedMessage, StreamId streamId)
```

Compares the stream identifier of a cached message.

### Parameters

- `cachedMessage` (`CachedMessage`): The cached message.
- `streamId` (`StreamId`): The stream identifier.

### Returns

`true` if streamId is equal to the [CachedMessage](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.cachedmessage/) value; otherwise `false`.