# GrainId.Key

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.grainid/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.grainid/properties/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Core.Abstractions/IDs/GrainId.cs#L49)

```csharp
public IdSpan Key
```

Gets the grain key.