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POSetting design time DataContext on a Window is giving a compiler error?
 

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    <p>I have the following XAML below for the main window in my WPF application, I am trying to set the design time <code>d:DataContext</code> below, which I can successfully do for all my various UserControls, but it gives me this error when I try to do it on the window...</p> <p><code>Error 1 The property 'DataContext' must be in the default namespace or in the element namespace 'http://schemas.microsoft.com/winfx/2006/xaml/presentation'. Line 8 Position 9. C:\dev\bplus\PMT\src\UI\MainWindow.xaml 8 9 UI</code></p> <pre><code>&lt;Window x:Class="BenchmarkPlus.PMT.UI.MainWindow" 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:UI="clr-namespace:BenchmarkPlus.PMT.UI" xmlns:Controls="clr-namespace:BenchmarkPlus.PMT.UI.Controls" d:DataContext="{d:DesignInstance Type=UI:MainViewModel, IsDesignTimeCreatable=True}" Title="MainWindow" Height="1000" Width="1600" Background="#FF7A7C82"&gt; &lt;Grid&gt; &lt;!-- Content Here --&gt; &lt;/grid&gt; &lt;/Window&gt; </code></pre>
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