For example, this is very useful but doesn't work in NoesisGUI:

public static readonly DependencyProperty SearchTextProperty =

DependencyProperty.Register(nameof(SearchText),

typeof(string),

typeof(TextBoxSearch),

new FrameworkPropertyMetadata(defaultValue: string.Empty)

{

BindsTwoWayByDefault = true,

DefaultUpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged

});