# ActivationId.IsDefault

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Core.Abstractions/IDs/ActivationId.cs#L31)

```csharp
public bool IsDefault
```

Gets a value indicating whether the instance is the default instance.