# CosmosGrainStorage

Package: [Microsoft.Orleans.Persistence.Cosmos](/orleans/docs/api/csharp/microsoft.orleans.persistence.cosmos/) 10.0.0

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Persistence.Cosmos) | [Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Azure/Orleans.Persistence.Cosmos/CosmosGrainStorage.cs#L11)

```csharp
public sealed class CosmosGrainStorage : ILifecycleParticipant<ISiloLifecycle>, IGrainStorage
```

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

- [CosmosGrainStorage(string, CosmosGrainStorageOptions, ILoggerFactory, IServiceProvider, IOptions&lt;ClusterOptions&gt;, IPartitionKeyProvider, IActivatorProvider)](/orleans/docs/api/csharp/microsoft.orleans.persistence.cosmos/orleans.persistence.cosmos.cosmosgrainstorage/constructors/constructor-string-orleans-persistence-cosmos-cosmosgrainstorageoptions-microsof-62cd9640/)

## Methods

- [ClearStateAsync(string, GrainId, IGrainState&lt;T&gt;)](/orleans/docs/api/csharp/microsoft.orleans.persistence.cosmos/orleans.persistence.cosmos.cosmosgrainstorage/methods/clearstateasync-1-string-orleans-runtime-grainid-orleans-igrainstate-t-46dbc51d/)
- [Participate(ISiloLifecycle)](/orleans/docs/api/csharp/microsoft.orleans.persistence.cosmos/orleans.persistence.cosmos.cosmosgrainstorage/methods/participate-orleans-runtime-isilolifecycle-787c1ac1/)
- [ReadStateAsync(string, GrainId, IGrainState&lt;T&gt;)](/orleans/docs/api/csharp/microsoft.orleans.persistence.cosmos/orleans.persistence.cosmos.cosmosgrainstorage/methods/readstateasync-1-string-orleans-runtime-grainid-orleans-igrainstate-t-bd972d7c/)
- [WriteStateAsync(string, GrainId, IGrainState&lt;T&gt;)](/orleans/docs/api/csharp/microsoft.orleans.persistence.cosmos/orleans.persistence.cosmos.cosmosgrainstorage/methods/writestateasync-1-string-orleans-runtime-grainid-orleans-igrainstate-t-ce2dbd4f/)