# UnavailableExceptionFallbackException.UnavailableExceptionFallbackException(string, Exception)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.unavailableexceptionfallbackexception/) | [Constructors](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.unavailableexceptionfallbackexception/constructors/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/ISerializableSerializer/UnavailableExceptionFallbackException.cs#L33-L40)

```csharp
public UnavailableExceptionFallbackException(string message, Exception innerException)
```

### Parameters

- `message` (`string`)
- `innerException` (`Exception`)