private void ComboBoxServiceType_EditValueChanged(object sender, EventArgs e) { ComboBoxExtensionPoint.Properties.Items.Clear(); if (ComboBoxServiceType.EditValue == null) { return; } ComboBoxExtensionPoint.Properties.Items.AddRange(ViewModelExtension.BuildServiceTypeExtensionPointList((string)ComboBoxServiceType.EditValue).BuildImageComboBoxItems().ToList()); }