wpf can't find control coordinates info - wpf

Question

I have a Group Box that contain a Stack Panel that contains a Combo Box (A) and a Text Box. And I have another Stack Panel (B) that contains a combo Box and a Label.
I would place the Combo Box B on the same level as Combo Box A (same y) using xaml code.
Please note that the GroupBox and and the Stack Panel(B) are placed in a grid in the same row, different columns.
I'm trying to bind the y coordinate of the Combo Box (B) to the y coordinate of the Combo Box (A).
Where I can find the coordinates info of wpf controls in the Visual Studio properties window ?
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<GroupBox Name="AGroupBox" Grid.Row="1" Grid.Column="0" >
<GroupBox.Header>
<Label Content="GroupBox" FontWeight="Bold" />
</GroupBox.Header>
<StackPanel Grid.Row="1" Grid.Column="0" Orientation="Horizontal">
<ComboBox x:Name="ComboBoxA" Width="100" Height="25" VerticalAlignment="Center"/>
<TextBlock x:Name="TextBlockA" Width="150" VerticalAlignment="Center" Margin="10,0,0,0" Text="This a Test" />
</StackPanel>
</GroupBox>
<StackPanel Grid.Row="1" Grid.Column="1" HorizontalAlignment="Left">
<Label x:Name="LabelB" Content="LabelB" />
<ComboBox x:Name="ComboBoxB" Width="150" Height="25"/>
</StackPanel>
</Grid>

Answer 1

a close equivalent of using y-coordinate would be using Margin property ... but it is going to break after the first resize attempt.
i think, it is possible to update Margin on resizes, but i would start with a more complex layout, like this:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<!--additional Grid used to position comboBoxes on the same height-->
<Grid Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition Height="Auto"/>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<!--group box is used as cover for the 1st column-->
<GroupBox Name="AGroupBox"
Grid.Row="0" Grid.RowSpan="3" Grid.Column="0" >
<GroupBox.Header>
<Label Content="GroupBox" FontWeight="Bold" />
</GroupBox.Header>
</GroupBox>
<!--stack panel with ComboBoxA is centered vertically in the 1st column-->
<StackPanel Grid.Row="1" Grid.Column="0"
Margin="5,0"
Orientation="Horizontal">
<ComboBox x:Name="ComboBoxA" Width="100" Height="25" VerticalAlignment="Center"/>
<TextBlock x:Name="TextBlockA" Width="150" VerticalAlignment="Center" Margin="10,0,0,0" Text="This a Test" />
</StackPanel>
<!--ComboBoxB is centered vertically in the 2nd column-->
<ComboBox x:Name="ComboBoxB"
Grid.Row="1" Grid.Column="1"
VerticalAlignment="Top" HorizontalAlignment="Left"
Width="150" Height="25"/>
<!--Label attached on top of ComboBoxB-->
<Label x:Name="LabelB" Content="LabelB"
Grid.Row="0" Grid.Column="1" VerticalAlignment="Bottom"/>
</Grid>
</Grid>