<p>What is the best way to stop a user from resizing the top-level window of an application written in WPF?</p>

You will want to use the
```
ResizeMode.NoResize
```
on the window.
```
```
<Window x:Class="WpfApplication5.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    ResizeMode="NoResize">
</Window>
```
```