private void TestDllNameComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e) { SelectCategoryComboBox.Items.Clear(); SelectModuleComboBox.Items.Clear(); SelectTestCaseComboBox.Items.Clear(); ClearGrid(); try { if (e.AddedItems.Count > 0) { string[] list = ProductDetails.GetCategoryList(); foreach (string s in list) { SelectCategoryComboBox.Items.Add(s); } } } catch (Exception exception) { DisplayErrorMessage("Loading Categories Failed - " + exception.Message); } }