'Declaration Public Property AllowCustomizedCategories As Nullable(Of Boolean)
public Nullable<bool> AllowCustomizedCategories {get; set;}
AllowCustomizedCategories property specifies whether the user can create and modify custom activity categories. User's custom activity categories are stored in Resource's Resource.CustomActivityCategories property. When this feature is enabled, an UI will be presented to the user in the activity dialog to allow adding a new custom category as well as modifying or removing any custom categories previously added. The UI will not allow the user to modify the categories specified via the ActivityCategoryItemsSource since they are common across all resources. The user (CurrentUser) can only modify the his or her own custom categories.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2