# ActivationId Properties

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

## IsDefault {#isdefault-4adac43a}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.activationid/properties/isdefault-4adac43a/)

[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.