DataGrid's ImageButton's RowCommand Does Not Fire

ref: http://www.wiktorzychla.com/2008/01/imagebutton-in-templatefield-does-not.html

When converting an asp.page from vb.net to c# one imagebutton in a templatefield would not fire the rowcommand.  Converting the imagebutton to a linkbutton with an image inside worked perfectly and looked exactly the same.

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