# ConnectionEventArgs class

Namespace: [Grasshopper2.Parameters](https://developer.rhino3d.com/api/gh2/namespace/grasshopper2.parameters.md) · Assembly: [Grasshopper2](https://developer.rhino3d.com/api/gh2/assembly/grasshopper2.md)

```cs
public class ConnectionEventArgs : EventArgs
```

Event arguments used in parameter addition and removal.

## Constructors

- [ConnectionEventArgs](https://developer.rhino3d.com/api/gh2/type/grasshopper2.parameters.connectioneventargs/ctor.md): Create a new ParameterEventArgs instance.

## Properties

- [Index](https://developer.rhino3d.com/api/gh2/type/grasshopper2.parameters.connectioneventargs/index.md): Gets the index of the parameter that was added or removed.
- [Parameter](https://developer.rhino3d.com/api/gh2/type/grasshopper2.parameters.connectioneventargs/parameter.md): Gets the parameter that was added or removed.