# Sandbox.UI.Panel.Switch

```csharp
bool Switch(PseudoClass c, bool state)
```

Switch a pseudo class on or off.

### Parameters

- `c` (`PseudoClass`)
- `state` (`bool`)

### Returns

`bool`

Declared in [Sandbox.UI.Panel](/api/Sandbox.UI.Panel).
Assembly: `Sandbox.Engine`.