# Sandbox.UI.LengthUnitExtension.IsDynamic

```csharp
static bool IsDynamic(LengthUnit unit)
```

Determine whether this unit type is dynamic (ie. should be updated regularly) or whether it's constant

### Parameters

- `unit` (`LengthUnit`)

### Returns

`bool`

Declared in [Sandbox.UI.LengthUnitExtension](/api/Sandbox.UI.LengthUnitExtension).
Assembly: `Sandbox.System`.