Dependency object and dependency properties ?

hi,

with refer to WPF,
DependencyObject is class that represent the object that participates in the dependency property.
Most of the WPF classes derive from Dependency Object. All UI Elements are derived from Dependency Object.Dependency Object defines WPF Property System.
 

Please refer
http://msdn.microsoft.com/en-us/library/system.windows.dependencyobject.aspx

for Dependencyproperty please refer
http://msdn.microsoft.com/en-us/library/ms752914.aspx
http://www.codeproject.com/Articles/140620/WPF-Tutorial-Dependency-Property

hope this will help you.