======Событие ModelWatcher.BeforeActivateCoreCollectionItem======
  * **Пространство имен:** [[developers:references:topomatic.alg.runtime.serviceclasses|Topomatic.Alg.Runtime.ServiceClasses]]
  * **Сборка:** Topomatic.Alg.Runtime (в Topomatic.Alg.Runtime.dll)
=====Синтаксис=====
<code csharp>public event EventHandler BeforeActivateCoreCollectionItem</code>