title: XAML can't find the converter class
body: <p>I'm displaying a popup with the following code:</p>
  
  <pre><code>&lt;Popup PlacementTarget="{Binding ElementName=categoryTagEditorControl}"
         Placement="Bottom"&gt;
      &lt;Popup.IsOpen&gt;
          &lt;MultiBinding Mode="OneWay" Converter="{StaticResource BooleanOrConverter}"&gt;
              &lt;Binding Mode="OneWay" ElementName="categoryTagEditorControl" Path="IsMouseOver"/&gt;
              &lt;Binding RelativeSource="{RelativeSource Self}" Path="IsMouseOver" /&gt;
          &lt;/MultiBinding&gt;
      &lt;/Popup.IsOpen&gt;
      &lt;StackPanel&gt;
          &lt;TextBox Text="Some Text.."/&gt;
          &lt;DatePicker/&gt;
      &lt;/StackPanel&gt;
  &lt;/Popup&gt;
  </code></pre>
  
  <p>Here's the code of BooleanOrConverter:</p>
  
  <pre><code>public class BooleanOrConverter : IMultiValueConverter
  {
      public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
      {
          foreach (object booleanValue in values)
          {
              if (booleanValue is bool == false)
              {
                  throw new ApplicationException("BooleanOrConverter only accepts boolean as datatype");
              }
              if ((bool)booleanValue == true)
              {
                  return true;
              }
          }
          return false;
      }
      public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
      {
          throw new NotSupportedException();
      }
  }
  </code></pre>
  
  <p>and its placed into PopupTest.InfoPanels.Windows namespace</p>
  
  <p>when I run this, I'm getting following exception:</p>
  
  <pre><code>Cannot find resource named 'BooleanOrConverter'. Resource names are case sensitive.
  </code></pre>
  
  <p>What should I change for this to work?</p>