# FileLoggerProviderExtensions Methods

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.testinghost/orleans.testinghost.logging.fileloggerproviderextensions/)

## AddFile(ILoggingBuilder, string) {#addfile-this-microsoft-extensions-logging-iloggingbuilder-string-64730027}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.testinghost/orleans.testinghost.logging.fileloggerproviderextensions/methods/addfile-this-microsoft-extensions-logging-iloggingbuilder-string-64730027/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.TestingHost/Logging/FileLoggerProvider.cs#L50-L53)

```csharp
public static ILoggingBuilder AddFile(this ILoggingBuilder builder, string filePathName)
```

Add [FileLoggerProvider](/orleans/docs/api/csharp/microsoft.orleans.testinghost/orleans.testinghost.logging.fileloggerprovider/) to `builder`

### Parameters

- `builder` (`ILoggingBuilder`): The logging builder.
- `filePathName` (`string`): The log file path

### Returns

The logging builder.