# 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) | [Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Core.Abstractions/Versions/Compatibility/BackwardCompatible.cs#L9)

```csharp
[Orleans.GenerateSerializer]
[Orleans.Immutable]
[Orleans.SuppressReferenceTracking]
public sealed class BackwardCompatible : CompatibilityStrategy
```

A grain interface version compatibility strategy which treats all versions of an interface compatible only with equal and lower requested versions.

## Constructors

- [BackwardCompatible](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.versions.compatibility.backwardcompatible/constructors/constructor-92ba1c2b/)

## Properties

- [Singleton](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.versions.compatibility.backwardcompatible/properties/singleton-a49ebc63/)