public SalaryManagerControl()
{
InitializeComponent();
dataManager = DataManager.dataManager;
AllSalaryList = new ObservableCollection <SalaryInfo>();
(FindResource("YearViewSource") as CollectionViewSource).Source = AlgorithmClass.GetYearList();
(FindResource("MonthViewSource") as CollectionViewSource).Source = AlgorithmClass.GetMonthList();
YearComboBox.SelectedItem = DateTime.Now.Year;
MonthComboBox.SelectedItem = DateTime.Now.Month;
}