# TestClusterOptions.ApplicationBaseDirectory

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.testinghost/orleans.testinghost.testclusteroptions/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.testinghost/orleans.testinghost.testclusteroptions/properties/)

[Source](https://github.com/dotnet/orleans/blob/b7a9e3e1c9c54b3cec3a467c5734bf7744541bcf/src/Orleans.TestingHost/TestClusterOptions.cs)

```csharp
public string? ApplicationBaseDirectory
```

Gets or sets the application base directory.

### Value

The application base directory.