# UnexpectedLengthPrefixValueException

Package: [Microsoft.Orleans.Serialization](/orleans/docs/api/csharp/microsoft.orleans.serialization/) 10.0.0

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Serialization) | [Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/Exceptions.cs#L564)

```csharp
[Orleans.GenerateSerializer]
public sealed class UnexpectedLengthPrefixValueException : SerializerException
```

A length encoded field which is expected to have a length

## Constructors

- [UnexpectedLengthPrefixValueException(string)](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.unexpectedlengthprefixvalueexception/constructors/constructor-string-f5d7ba25/)
- [UnexpectedLengthPrefixValueException(string, uint, uint)](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.unexpectedlengthprefixvalueexception/constructors/constructor-string-uint-uint-68e4b2f9/)