# GuidId Fields

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.guidid/)

## Guid {#guid-bf4ae218}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.guidid/fields/guid-bf4ae218/)

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

```csharp
[Orleans.Id(0)]
public readonly Guid Guid
```

The underlying [GuidId](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.guidid/).