How to increase Item size in Itemcontrol in WPF

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C#

WPF

Hi all

Hi every one i have one item control with drag and drop operation and its working fine. But my problem is i need to increase the image button size of itemscontrol as well as the window size. I had design the image button as custom design. Whenever i resize the window the controls of itemcontrol are also increased or decreased. but it is not happen. Here i give my Itemcontrol design. Please help me as soonas possible.

<grid grid.row="2" grid.columnspan="3" name="griddraganddrop">

                <scrollviewer x:name="svdraganddrop" horizontalalignment="Stretch" verticalalignment="Stretch" horizontalscrollbarvisibility="Disabled" verticalscrollbarvisibility="Hidden" xmlns:x="#unknown">
                    <itemscontrol x:name="ItemControlButton" draganddrop:dragdrophelper.dragdroptemplate="{StaticResource planetTemplateDrag}" draganddrop:dragdrophelper.isdragsource="True" draganddrop:dragdrophelper.isdroptarget="true" margin="5,10,5,5" horizontalalignment="Stretch" verticalalignment="Stretch" xmlns:draganddrop="#unknown">
                        <itemscontrol.itemspanel>
                            <itemspaneltemplate>
                                <wrappanel orientation="Horizontal" horizontalalignment="Stretch" verticalalignment="Stretch" name="WrapButton"></wrappanel>
                            </itemspaneltemplate>
                        </itemscontrol.itemspanel>
                        <itemscontrol.itemtemplate>
                            <datatemplate>

                            </datatemplate>
                        </itemscontrol.itemtemplate>
                    </itemscontrol>
                </scrollviewer>
            </grid>