DocFx,SystemLibrary.Common.Episerver.Properties.MessageConfig,SystemLibrary.Common.Episerver.Properties.MessageEditorDescriptor,SystemLibrary.Common.Episerver.Properties.MessageProperty,SystemLibrary.Common.Episerver.Properties.MessageController,SystemLibrary.Common.Episerver.Attributes.BoxSelectionController,SystemLibrary.Common.Episerver.Attributes.BoxSelectionFactory,SystemLibrary.Common.Episerver.Attributes.JsonEditController,SystemLibrary.Common.Episerver.Attributes.JsonEditFactory,SystemLibrary.Common.Episerver.Descriptors.HideCategoryListDescriptor,SystemLibrary.Common.Episerver.Properties.ParentLinkReferenceController,SystemLibrary.Common.Episerver.Properties.ParentLinkReferenceEditorDescriptor,SystemLibrary.Common.Episerver.Properties.ParentLinkReferenceProperty,SystemLibrary.Common.Episerver.Attributes.MultiDropdownSelectionController,SystemLibrary.Common.Episerver.Attributes.MultiDropdownSelectionFactory,SystemLibrary.Common.Episerver.Initialize.RemoveSuggestedContentTypes,SystemLibrary.Common.Episerver.Extensions.CommonEpiserverApplicationServicesOptions,SystemLibrary.Common.Episerver.Extensions.CommonEpiserverApplicationBuilderOptions,SystemLibrary.Common.Episerver.EditController,SystemLibrary.Common.Episerver.Abstract.BaseController,SystemLibrary.Common.Episerver.Abstract.BaseMultiSelectionFactory,SystemLibrary.Common.Episerver.ConnectionStringsConfig,SystemLibrary.Common.Episerver.PropertiesConfig,SystemLibrary.Common.Episerver.EditConfig,SystemLibrary.Common.Episerver.Properties.MessageConfig,SystemLibrary.Common.Episerver.FontAwesome,SystemLibrary.Common.Episerver.AppSettings.Configuration,SystemLibrary.Common.Episerver.Attributes.ParentLinkReferenceFactory,SystemLibrary.Common.Episerver.Abstract.InternalBaseController,WebApplicationInitializer
Enables the ContentData to only be created once, then it will be hidden from the "New Content Dialogs" in the CMS.
If you delete the content it will be visible again
public interface ISingleton