Infragistics Silverlight XamGrid with different layouts in hierarchy

How can I create a XamGrid with a ColumnLayout that looks like,

| Name |

John

(+/-)

   | First Name | Last Name | Address 开发者_如何学Python|

Mary

(+/-)

| Height | Weight |

From the description it appears that you would like to have a hierarchical grid where you would expand out different details for different rows. The XamGrid does allow sibling ColumnLayouts in a nested layout and there is an example of this in the help topic for Defining Hierarchical Layouts: http://help.infragistics.com/NetAdvantage/Silverlight/Current/CLR4.0?page=xamGrid_Defining_Hierarchical_Layouts.html