# HashBasedPlacementAttribute

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/Placement/PlacementAttribute.cs#L52)

```csharp
public sealed class HashBasedPlacementAttribute : PlacementAttribute
```

Marks a grain class as using the [HashBasedPlacement](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.hashbasedplacement/) policy.

## Constructors

- [HashBasedPlacementAttribute](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.placement.hashbasedplacementattribute/constructors/constructor-05573a81/)