WPF Form Designer Prototype (MVVM)

<Window x:Class="WPFFormDesigner.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:ViewModels="clr-namespace:WPFFormDesigner.ViewModels" xmlns:WPFFormDesigner="clr-namespace:WPFFormDesigner" Title="MainWindow">
        <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="1.5*"/>
            <ColumnDefinition Width="6*"/>
            <ColumnDefinition Width="2.5*"/>
        </Grid.ColumnDefinitions>
    <!--<DockPanel Name="dockPanel1" >-->
        <Menu Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="3">
            <MenuItem Header="_File">
                <MenuItem Header="_Open..." Command="{Binding Path=OpenFormFromFileCommand}"/>
                <MenuItem Header="_New" Command="{Binding Path=NewFormCommand}"/>
                <!--<MenuItem Header="_Close" Command="{Binding Path=CloseFormCommand}"/>-->
                <MenuItem Header="_Save" Command="{Binding Path=SaveFormCommand}"/>
            </MenuItem>
        </Menu>
        <WPFFormDesigner:FormDesignerSurface DataContext="{Binding Path=FormDesignerSurfaceVM,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Grid.Row="1" Grid.Column="1"/>
        <WPFFormDesigner:ToolboxView  Grid.Row="1" Grid.Column="0"/>
        <WPFFormDesigner:PropertiesView DataContext="{Binding Path=PropertiesVM,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Grid.Row="1" Grid.Column="2"/>
    <!--</DockPanel>-->
    </Grid>
</Window>