# UnknownFieldMarker Constructors

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

## UnknownFieldMarker(Field, long) {#constructor-orleans-serialization-wireprotocol-field-long-229dbd3e}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.unknownfieldmarker/constructors/constructor-orleans-serialization-wireprotocol-field-long-229dbd3e/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/Codecs/UnknownFieldMarker.cs#L15-L19)

```csharp
public UnknownFieldMarker(Field field, long position)
```

Initializes a new instance of the [UnknownFieldMarker](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.unknownfieldmarker/) class.

### Parameters

- `field` (`Field`): The field.
- `position` (`long`): The position.