Application minimum height determined by children minimum height

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="buttonStack.MainWindow" x:Name="Window" Title="MainWindow" Width="640" Height="480" MinWidth="{Binding RelativeSource={RelativeSource Self}, Path=Content.MinWidth}"><DockPanel MinWidth="300"><Button x:Name="button1" Content="Button1" MinWidth="100"/><Button x:Name="button2" Content="Button2" MinWidth="100"/><Button x:Name="button3" Content="Button3" MinWidth="100"/></DockPanel> </Window>