# ActivationId Constructors

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

## ActivationId(Guid) {#constructor-system-guid-1a247de9}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.activationid/constructors/constructor-system-guid-1a247de9/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Core.Abstractions/IDs/ActivationId.cs#L26)

```csharp
public ActivationId(Guid key)
```

Initializes a new instance of the [ActivationId](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.activationid/) struct.

### Parameters

- `key` (`Guid`): The activation id.