title: DataContext is not bind in the XAML file
body: <p>I am new to WPF + MVVM architecture. In my application, I am trying to implement "DataContext" in the XAML itself as below</p>
  
  <pre><code>&lt;Window x:Class="MyWPF.UI.MainWindow"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:vm="clr-namespace:MyWPF.UI.ViewModel"
      Title="MainWindow" Height="350" Width="525"&gt;
  
      &lt;Window.DataContext&gt;
          &lt;vm:Northwind_DataViewModel&gt;&lt;/vm:Northwind_DataViewModel&gt;
      &lt;/Window.DataContext&gt;
  
      &lt;Grid&gt;
      &lt;/Grid&gt;
  
  &lt;/Window&gt;
  </code></pre>
  
  <p>I am getting "The name 'Northwind_DataViewModel' does not exists in the namespace 'clr-namespace:MyWPF.UI.ViewModel".</p>
  
  <p>I have ViewModel file. Before using "DataContext", I built this application.</p>
  
  <p>Could you please let me know what is wrong with my code?</p>
  
  <p>thanks</p>