private void ToggleButton_Click_1(object sender, RoutedEventArgs e) {
var dat = new StringSearchCriteriaDialog("ext", edtSearchBox.ExtensionCondition, FindResource("btnExtCP") as string);
dat.ShowDialog();
if (dat.Confirm) {
edtSearchBox.ExtensionCondition = "ext:" + dat.textBox1.Text;
ExtToggle.IsChecked = dat.textBox1.Text.Any();
} else {
ExtToggle.IsChecked = Utilities.GetValueOnly("ext", edtSearchBox.ExtensionCondition).Any();
}
}