Question

I have two ToolBars in ToolBarTray. Although they can fit in one line, I want to put each ToolBar in new line.
How Can I do that ?

<ToolBarTray VerticalAlignment="Top" Margin="0,20,70,0" Height="65">
    <ToolBar Height="30" VerticalAlignment="Top" Background="LightGray" >
        <Label>Name :</Label>
        <TextBox Width="120"></TextBox>
        <ComboBox Width="120" Margin="5,0,0,0">
            <ComboBoxItem>Item 1</ComboBoxItem>
            <ComboBoxItem>Item 2</ComboBoxItem>
            <ComboBoxItem>Item 3</ComboBoxItem>
        </ComboBox>
        <Button Height="25" Width="80" Background="White" Margin="5,0,0,0">Search</Button>
        <Label>This is a first ToolBar</Label>
        <Button Height="25" Width="80" Background="White" Margin="5,0,0,0" ToolBar.OverflowMode="Always">Look for ..</Button>
    </ToolBar>

        <ToolBar Height="30" VerticalAlignment="Top" Background="LightGray">
            <Label>Name :</Label>
            <TextBox Width="120"></TextBox>
            <ComboBox Width="120" Margin="5,0,0,0">
                <ComboBoxItem>Item 1</ComboBoxItem>
                <ComboBoxItem>Item 2</ComboBoxItem>
                <ComboBoxItem>Item 3</ComboBoxItem>
            </ComboBox>
        </ToolBar>
    </ToolBarTray>

Answer 1

From MSDN: ToolBar.BandIndex Property:

The position of the ToolBar in a ToolBarTray depends on the values of
the ToolBarTray.Orientation, Band, and BandIndex properties. When
Orientation is set to Horizontal, a band represents a row in the
ToolBarTray. When Orientation is Vertical, a band represents a column
of the ToolBarTray.

In this case, you’ll need to set the ToolBarTray.Orientation Property to Vertical:

<ToolBarTray Orientation="Vertical"
             VerticalAlignment="Top" Margin="0,20,70,0" Height="65">
  <etc />
</ToolBarTray>

And, don’t forget about ToolBar.Band and ToolBar.BandIndex Properties:

If you do not explicitly set this property, its value is determined by
the order in which the ToolBar is set in the ToolBarTray. For example,
if you put two toolbars in a ToolBarTray without setting the Band and
BandIndex properties, the value of Band will be 0 for both toolbars.
The value of BandIndex will be 0 for the first toolbar and 1 for the
second toolbar.