Hi Dorin,

 You can refer to the product documentation on Master/Detail feature, more particularly the section that describes how the auto-detection of details is done:

http://doc.xceedsoft.com/products/XceedWpfDataGrid/Detail_Descriptions.html

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Marc Laroche
Software Developer
Xceed Software Inc.

I don’t suffer from insanity, I enjoy every minute of it. - Unknown