ExtendedDisplayNameAttribute: In conjunction with the EnumDisplayNameConverter type converter, this attribute allows a DisplayName to be specified on members that are not allowed by the Framework DisplayName attribute, such as fields and enum values. LocalizedDisplayName, LocalizedDescription, LocalizedCategory: Theses attributes allow to easily localize the DisplayName, Description, and Category attributes values using standard Resx resource files. This feature is only available in the "Plus" version. Click here for more details about Xceed Toolkit Plus for WPF.