# ClusterOptions.DefaultServiceId

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.configuration.clusteroptions/) | [Fields](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.configuration.clusteroptions/fields/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Core/Configuration/Options/ClusterOptions.cs)

```csharp
public const string DefaultServiceId
```

The default value of [ClusterOptions](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.configuration.clusteroptions/).