# GrainReminderExtensions.UnregisterReminder(Grain, IGrainReminder)

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

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

```csharp
public static Task UnregisterReminder(this Grain grain, IGrainReminder reminder)
```

Unregisters a previously registered reminder.

### Parameters

- `grain` (`Grain`): The grain instance.
- `reminder` (`IGrainReminder`): Reminder to unregister.

### Returns

Completion promise for this operation.