title: MonoDroid - setting background color from colors.xml throws InvalidOperationException
body: <p>I have a simple layout as follows:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
    &lt;LinearLayout
    android:id="@+id/widget30"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/translucent_red"
    android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android"&gt;
  </code></pre>
  
  <p></p>
  
  <p>My colors.xml file is as follows:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;resources&gt;
    &lt;color name="opaque_red"&gt;#f00&lt;/color&gt;
    &lt;color name="translucent_red"&gt;#80ff0000&lt;/color&gt;
  &lt;/resources&gt;
  </code></pre>
  
  <p>When I compile in VS2010 I get an error "System.InvalidOperationException: Command failed...." I have tried to place the colors.xml in res/values and res/color but I still
  get the error. If I reference the color directly like:</p>
  
  <pre><code>android:background="#80ff0000"
  </code></pre>
  
  <p>everything works fine.</p>
  
  <p>Does anyone know if the colors.xml is supported by MonoDroid and if so why I'm getting this error?</p>
  
  <p>Thanks for the help!</p>