c# - WPF DataGrid Mysterious Margin -


i'm using mahapps in project cool vs2012 style , trying implement datagrid style it. i'm finished , detected mysterious margin around datagrid (the same around listview though). if carefully, you'd able see on screen.

http://i.stack.imgur.com/6lpuf.jpg

i tried snoop makes app crash try inject "sniffer". able wpf inspector , didn't saw margin in datagrid template.

does have idea of margin's origin ?

thanks in advance.


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