Binding for non hierarchical object

If you have an object who is not in herarchical tree, like converter, you cannot bind something even you have define DependyProperty on it.

first you must prepare you converter for having DependencyProperty by override DependencyObject

public class SelectionConverter : DependencyObject, IMultiValueConverter

then create DependencyProperties

#region Window (DP SHORT)
public object Window { get { return (object)GetValue(WindowProperty); } set { SetValue(WindowProperty, value); } }
public static readonly DependencyProperty WindowProperty = DependencyProperty.Register("Window", typeof(object), typeof(SelectionConverter), new PropertyMetadata(null));
#endregion

#region Name (DP SHORT)
public object Name { get { return (object)GetValue(NameProperty); } set { SetValue(NameProperty, value); } }
public static readonly DependencyProperty NameProperty = DependencyProperty.Register("Name", typeof(object), typeof(SelectionConverter), new PropertyMetadata(null));
#endregion 

and finally set binding in xaml

as the converter is not in herarchical tree i cannot using binding with ElementName= but i can use x:reference like this

<local:SelectionConverter x:Key="sc"
     x:Shared="false"
     Window="{Binding ., Source={x:Reference win}}"
     Name="{Binding Content, Source={x:Reference cb}}" />