FacultyModel.cs CampusAppWP8::Model::Departments::FacultyModel CampusAppWP8::Model::Departments usingSystem; usingSystem.Collections.Generic; usingSystem.Collections.ObjectModel; usingSystem.Linq; usingSystem.Text; usingSystem.Xml.Serialization; usingCampusAppWP8.Resources; namespaceCampusAppWP8.Model.Departments { publicclassFacultyModel:BaseModel { [XmlElement("chair")] publicObservableCollection<ChairModel>chairs{get;set;} //publicObservableCollection<DepartmentModel>_faculties{get;set;} privatestringname="t_fak"; publicFacultyModel() { //this.Faculties=newObservableCollection<DepartmentModel>(); this.chairs=newObservableCollection<ChairModel>(); } publicFacultyModel(stringname) { this.name=name; //this.Faculties=newObservableCollection<DepartmentModel>(); this.chairs=newObservableCollection<ChairModel>(); } publicObservableCollection<ChairModel>Chairs { get{returnthis.chairs;} set { if(value!=this.chairs) { this.chairs=value; NotifyPropertyChanged("faculty"); } } } [XmlAttribute("id")] publicstringName { get { returnAppResources.Faculty+""+this.name; } set { if(value!=this.name) { this.name=value; NotifyPropertyChanged("faculty"); } } } } }