# Codec_BackwardCompatible

Package: [Microsoft.Orleans.Core.Abstractions](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/) 10.0.0

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Core.Abstractions)

```csharp
public sealed class Codec_BackwardCompatible : IFieldCodec, IFieldCodec<BackwardCompatible>
```

Supports all classes in the .NET class hierarchy and provides low-level services to derived classes. This is the ultimate base class of all .NET classes; it is the root of the type hierarchy.

## Constructors

- [Codec_BackwardCompatible](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleanscodegen.orleans.versions.compatibility.codec-backwardcompatible/constructors/constructor-f6ef5925/)

## Methods

- [Deserialize(Reader&lt;TReaderInput&gt;, BackwardCompatible)](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleanscodegen.orleans.versions.compatibility.codec-backwardcompatible/methods/deserialize-1-ref-orleans-serialization-buffers-reader-treaderinput-orleans-vers-2ce4e497/)
- [ReadValue(Reader&lt;TReaderInput&gt;, Field)](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleanscodegen.orleans.versions.compatibility.codec-backwardcompatible/methods/readvalue-1-ref-orleans-serialization-buffers-reader-treaderinput-orleans-serial-df05e990/)
- [Serialize(Writer&lt;TBufferWriter&gt;, BackwardCompatible)](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleanscodegen.orleans.versions.compatibility.codec-backwardcompatible/methods/serialize-1-ref-orleans-serialization-buffers-writer-tbufferwriter-orleans-versi-0d13ba78/)
- [WriteField(Writer&lt;TBufferWriter&gt;, uint, Type, BackwardCompatible)](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleanscodegen.orleans.versions.compatibility.codec-backwardcompatible/methods/writefield-1-ref-orleans-serialization-buffers-writer-tbufferwriter-uint-system-9a9c3dca/)