Attached Properties are DependencyProperties

See "Attached Properties" at http://www.wpftutorial.net/dependencyproperties.html

XAML Concepts

See http://msdn.microsoft.com/en-us/library/ms752059.aspx for descriptions of:

XAML Object Elements (represent WPF types)
Property Element Syntax (vs Attribute Syntax)
Markup Extensions - for setting property dynamically at runtime
Type Converters (e.g. Margin/Thickness)

itemscontrol itemspresenter listbox

http://stackoverflow.com/questions/3723893/itemscontrol-itemspanel-and-itemspresenter-silverlight-xaml
Note, ex on itemspanel "Basically, the ItemPresenter (specified in the Template) will be replaced with whatever is specified in the ItemsPanelTemplate." -mmmmmm