# HostingExtensions.UseCosmosReminderService(IServiceCollection, Action<OptionsBuilder<CosmosReminderTableOptions>>)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.reminders.cosmos/orleans.hosting.hostingextensions/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.reminders.cosmos/orleans.hosting.hostingextensions/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Azure/Orleans.Reminders.Cosmos/HostingExtensions.cs)

```csharp
public static IServiceCollection UseCosmosReminderService(this IServiceCollection services, Action<OptionsBuilder<CosmosReminderTableOptions>> configure)
```

Adds reminder storage backed by Azure Cosmos DB.

### Parameters

- `services` (`IServiceCollection`): The service collection.
- `configure` (`Action<OptionsBuilder<CosmosReminderTableOptions>>`): The delegate used to configure the reminder store.

### Returns

The provided `Microsoft.Extensions.DependencyInjection.IServiceCollection`, for chaining.