public void DeleteAllDynamicItemsInProvider(string providerName = "") { DynamicModuleManager dynamicModuleManager = DynamicModuleManager.GetManager(providerName); Type contenttypeType = TypeResolutionService.ResolveType("Telerik.Sitefinity.DynamicTypes.Model.PressRelease.PressArticle"); dynamicModuleManager.DeleteDataItems(contenttypeType); dynamicModuleManager.SaveChanges(); }