DrawingLB.xaml

<UserControl x:Class="Polymetal.Pdms.Design.DrawListManager.DrawingLb"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             Loaded ="DrawingLb_Loaded"
             SizeChanged="DrawingLb_SizeChanged"
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <Canvas Name ="canvas" 
                MouseLeftButtonDown="DrawingLb_MouseLeftButtonDown"
                MouseMove="DrawingLb_MouseMove" 
                MouseLeftButtonUp="DrawingLb_MouseLeftButtonUp" 
                MouseEnter="Canvas_OnMouseEnter"
                />
    </Grid>
</UserControl>