Respect IVirtualizedItemProvider for items of RadGridView . 

Currently, within the LoadItems() method the items are being iterated directly, thus a second query to the database is triggered.  A separate list for this operation should be created.

WinForms: http://www.telerik.com/help/winforms/gridview-grouping-setting-groups-programmatically.html

You can find our online documentation on a detailed information on the currently supported grouping:
http://docs.telerik.com/devtools/wpf/controls/radgridview/grouping/basics.html

Workaround: reused the cell element like this:
CreateCellElement(Telerik.Windows.Controls.GridView.GridViewCell cell, object dataItem)
{
    var button = cell.Content as Button;
    . . .
 
    return button;
}

It is difficult to track whether the newly added items are pasted or not crated by insert.

Available in LIB version 2016.3.1227, it will be also available in the 2017 R1 release.

Available in LIB version 2016.3.1212, it will be also available in the 2017 R1 release.

When a predefined RowTemplate is set with RowStyle property the Adding New Item functionality fails. As a workaround we suggest extracting a Style based on our GridViewRowStyle and targeting the GridViewRow.

Available in LIB version 2016.3.1212, it will be also available in the 2017 R1 release.

Available in LIB version 2016.3.1121, it will be also available in the 2017 R1 Release.

Available in LIB version 2016.3.1121, it will be also available in the 2017 R1 Release.