# ReminderEntry.GrainId

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.reminders/orleans.reminderentry/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.reminders/orleans.reminderentry/properties/)

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

```csharp
[Orleans.Id(0)]
public GrainId GrainId
```

Gets or sets the grain ID of the grain that created the reminder. Forms the reminder primary key together with [ReminderEntry](/orleans/docs/api/csharp/microsoft.orleans.reminders/orleans.reminderentry/).