# UnknownFieldMarker Properties

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

## Field {#field-2ce7efc6}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.unknownfieldmarker/properties/field-2ce7efc6/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/Codecs/UnknownFieldMarker.cs#L29)

```csharp
public Field Field
```

The field header.

## Position {#position-ab107d33}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.unknownfieldmarker/properties/position-ab107d33/)

[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.