```
<Grid>
    <ComboBox Name="comboBox1" />
    <TextBox Name="TextBox1" />
</Grid>

```

In my wpf application I want to display a textbox on a combobox but i don't know how to maintain textbox size so that it only covers the box part of the combobox and not the down arrow part of combobox?

![like this](https://i.stack.imgur.com/rzU5J.jpg)