title: WPF: Xaml, create an observable collection<object> in xaml in .NET 4.0
body: <p><a href="http://www.wpftutorial.net/XAML2009.html" rel="noreferrer">the web site</a> says you can in .NET 4.0</p>
  
  <p>I cant seem to do it though, what assesmbly references and xmlns' do i need</p>
  
  <p>the following does not work</p>
  
  <pre><code>xmlns:coll="clr-namespace:System.Collections.ObjectModel;assembly=mscorlib"
  
  &lt;coll:ObservableCollection x:TypeArguments="x:Object"&gt;
      &lt;MenuItem Command="ApplicationCommands.Cut"/&gt;
      &lt;MenuItem Command="ApplicationCommands.Copy"/&gt;
      &lt;MenuItem Command="ApplicationCommands.Paste"/&gt;
  &lt;/coll:ObservableCollection&gt;
  </code></pre>