title: 'Controls' is an undeclared prefix; XML is not valid
body: <p>So here's my xaml:</p>
  
  <pre><code>&lt;Window x:Class="KinectButton.Window1"
          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
          xmlns:Controls="clr-namespace:Coding4Fun.Kinect.Wpf.Controls;assembly=Coding4Fun.Kinect.Wpf"
          Title="Weather" Height="1024" Width="1280" WindowStartupLocation="CenterScreen"&gt;
      &lt;Grid x:Name="LayoutRoot"&gt;
          &lt;Grid.ColumnDefinitions&gt;
              &lt;ColumnDefinition Width="812*" /&gt;
              &lt;ColumnDefinition Width="446*" /&gt;
          &lt;/Grid.ColumnDefinitions&gt;
          &lt;Canvas Background="#FF371780" Grid.ColumnSpan="2"&gt;
              &lt;Controls:HoverButton Margin="0" Padding="0" x:Name="kinectButton" ImageSize="50"                                           
                                  ImageSource="/Images/RightHand.png"  
                                  ActiveImageSource="/Images/RightHand.png" 
                                  TimeInterval="2000"  Panel.ZIndex="1000" Canvas.Left="0" Canvas.Top="0" /&gt;
              &lt;Button x:Name="button1" Content="Close" Height="141" Canvas.Left="979" Canvas.Top="6" Width="273" Background="#FFFFF600" FontSize="53.333" Click="button1_Click" BorderThickness="4" Foreground="#FF1A1717" /&gt;
              &lt;Label Canvas.Left="0" Canvas.Top="733" Content="" Height="1024" Name="message" Width="1280" Foreground="White" FontSize="40" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" /&gt;
              &lt;Image Height="128" Name="videoStream" Stretch="Fill" Width="191" Canvas.Left="539" Canvas.Top="825" /&gt;
          &lt;/Canvas&gt;
      &lt;/Grid&gt;
  &lt;/Window&gt;
  </code></pre>
  
  <p>And it keeps giving the error:
  ''Controls' is an undeclared prefix. Line 11, position 14.' XML is not valid.</p>