WPF Form Designer Prototype (MVVM)

<Grid ShowGridLines="True" Background="#FFF0EDD1" Name="myGrid" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:wpffdc="clr-namespace:WPFFormDesigner.Converters;assembly=WPFFormDesigner" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <Grid.ColumnDefinitions>
    <ColumnDefinition Width="Auto" />
    <ColumnDefinition Width="Auto" />
    <ColumnDefinition Width="Auto" />
    <ColumnDefinition Width="Auto" />
    <ColumnDefinition Width="Auto" />
    <ColumnDefinition Width="Auto" />
    <ColumnDefinition Width="Auto" />
  </Grid.ColumnDefinitions>
  <Grid.RowDefinitions>
    <RowDefinition Height="Auto" />
  </Grid.RowDefinitions>
  <Border BorderThickness="2,2,2,2" BorderBrush="#FF000000" Background="#FF808080" Width="100" Height="60" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Opacity="0.25" Grid.Column="1" Grid.Row="0" />
  <TextBlock Text="Drag control here" Foreground="#FF000000" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" AllowDrop="True" Grid.Column="1" Grid.Row="0" />
  <Border BorderThickness="2,2,2,2" BorderBrush="#FF000000" Background="#FF808080" Width="100" Height="60" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Opacity="0.25" Grid.Column="2" Grid.Row="0" />
  <TextBlock Text="Drag control here" Foreground="#FF000000" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" AllowDrop="True" Grid.Column="2" Grid.Row="0" />
  <Border BorderThickness="2,2,2,2" BorderBrush="#FF000000" Background="#FF808080" Width="100" Height="60" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Opacity="0.25" Grid.Column="3" Grid.Row="0" />
  <TextBlock Text="Drag control here" Foreground="#FF000000" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" AllowDrop="True" Grid.Column="3" Grid.Row="0" />
  <Border BorderThickness="2,2,2,2" BorderBrush="#FF000000" Background="#FF808080" Width="100" Height="60" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Opacity="0.25" Grid.Column="4" Grid.Row="0" />
  <TextBlock Text="Drag control here" Foreground="#FF000000" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" AllowDrop="True" Grid.Column="4" Grid.Row="0" />
  <Border BorderThickness="2,2,2,2" BorderBrush="#FF000000" Background="#FF808080" Width="100" Height="60" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Opacity="0.25" Grid.Column="5" Grid.Row="0" />
  <TextBlock Text="Drag control here" Foreground="#FF000000" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" AllowDrop="True" Grid.Column="5" Grid.Row="0" />
  <StackPanel Orientation="Horizontal" Grid.Column="6" Grid.Row="0">
    <Ellipse Tag="btn_Add" Width="20" Height="20" Margin="10,5,5,5" ToolTip="Add Grid Row below">
      <Ellipse.Fill>
        <ImageBrush ImageSource="pack://application:,,,/WPFFormDesigner;component/Resources/Icons/insert-below.png" />
      </Ellipse.Fill>
    </Ellipse>
    <Ellipse Tag="btn_Remove" Width="20" Height="20" Margin="10,5,10,5" ToolTip="Remove current Grid Row">
      <Ellipse.Fill>
        <ImageBrush ImageSource="pack://application:,,,/WPFFormDesigner;component/Resources/Icons/delete.png" />
      </Ellipse.Fill>
    </Ellipse>
  </StackPanel>
  <Label Width="Auto" Height="Auto" Margin="3,7,3,7" ToolTip="Label" Grid.Column="0" Grid.Row="0">
    <Label.ContextMenu>
      <ContextMenu ItemsSource="{x:Null}">
        <MenuItem Command="{Binding Path=PropertiesCommand}" Header="Show Properties" ItemsSource="{x:Null}">
          <MenuItem.CommandParameter>
            <Binding Path="PlacementTarget" RelativeSource="{RelativeSource Mode=FindAncestor, AncestorType=ContextMenu, AncestorLevel=1}">
              <Binding.Converter>
                <wpffdc:WPFPropertyGridProxyConverter />
              </Binding.Converter>
            </Binding>
          </MenuItem.CommandParameter>
        </MenuItem>
        <MenuItem Command="{Binding Path=RemoveControlCommand}" CommandParameter="{Binding Path=PlacementTarget, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ContextMenu, AncestorLevel=1}}" Header="Remove Control" ItemsSource="{x:Null}" />
        <MenuItem Command="{Binding Path=MergeCellsCommand}" CommandParameter="{Binding Path=PlacementTarget, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ContextMenu, AncestorLevel=1}}" Header="Merge Cells" ItemsSource="{x:Null}" />
      </ContextMenu>
    </Label.ContextMenu>Label</Label>
</Grid>