<misc:UserControl x:Class="Alchemy.UI.MyControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:local="clr-namespace:Alchemy.UI"
             xmlns:misc="clr-namespace:Alchemy.UI.Misc"
             mc:Ignorable="d"
             d:DesignHeight="1080"
             d:DesignWidth="1920">
  <Grid>
    <Rectangle Width="200" Height="100" Fill="Red"/>
  </Grid>
</misc:UserControl>