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<Grid>
<Canvas Name="paintSurface" MinWidth="300" MinHeight="300" MouseDown="Canvas_MouseDown_1" MouseMove="Canvas_MouseMove_1" >
<Canvas.ContextMenu>
<ContextMenu>
<MenuItem Header="属性" Click="ViewMenuItem_Click"/>
<MenuItem Header="删除" Click="ViewMenuItem_Click"/>
</ContextMenu>
</Canvas.ContextMenu>
</Canvas>
</Grid>