 <p>I don't believe there is complete documentation prepared for the WPF Toolkit components at this time.</p> <p>There are beta docs for the <a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.datagrid(VS.100).aspx" rel="nofollow noreferrer">DataGrid itself here</a>, but I couldn't find anything w.r.t. the virtualization extensions, sorry!</p>