# Sandbox.ChangeAttribute

This will invoke a method when the property changes. It can be used with any property but is especially useful
when combined with [Sync] or [ConVar].



If no name is provided, we will try to call On[PropertyName]Changed. The callback should have 2 arguments - oldValue and newValue, both of the same type as the property itself.

- Kind: attribute
- Namespace: `Sandbox`
- Assembly: `Sandbox.System`

## Constructors

- [`ChangeAttribute`](/api/Sandbox.ChangeAttribute/.ctor)

## Properties

- [`Name`](/api/Sandbox.ChangeAttribute/Name): Name of the method to call on change. If no name is provided, we will try to call On[PropertyName]Changed.