Hi Pouyan,

When content instances aka modules are deleted from the content catalog we need a feature specific way to delete content for the feature that is associated with the deleted module . ContentDeleteHandlerProvider is a base class for features to implement.The FeatureDefinition.DeleteProvider must correspond to the name of the feature specific implementation, so that the system can invoke the correct ContentDeleteHandlerProvider.

So:

1-You can create a yourfeatureContentDeleteHandler calss that inherits from ContentDeleteHandlerProvider.

2-Create a yourfeatureContentDeleteHandler.confg file in you feature setup/ProviderConfig/contentdeletehandlers folder with following content:

<?xml version="1.0" encoding="utf-8" ?>

<ContentDeleteProviders>

<providers>

<add name="yourfeatureContentDeleteHandler"

type="yourfeaturenamespace.yourfeatureContentDeleteHandler, yourfeatureassemblyname"

description="Deletes related content when a module is deleted" />

</providers>

</ContentDeleteProviders>

For more details see setup/ProviderConfig/webstoredeletehandler.config and Helpers/WebStoreContentDeleteHandler.cs in WebStore.UI Projecr.

Hope Helps

Asad