# UnknownFieldMarker.Position

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.unknownfieldmarker/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.unknownfieldmarker/properties/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/Codecs/UnknownFieldMarker.cs#L24)

```csharp
public long Position
```

The position into the stream at which this field occurs.