How can I avoid TextBox vertical streching in following example:
<StackPanel Orientation="Horizontal">
<Button Height="40">OK</Button>
<TextBox Width="200"></TextBox>
</StackPanel>
Use the VerticalAlignment Property
<StackPanel Orientation="Horizontal">
<Button Height="40">OK</Button>
<TextBox Width="200" VerticalAlignment="Center"></TextBox>
</StackPanel>