title: Xamarin.Android Button Border was not declared
body: <p>I cannot set the <code>BorderColor</code> attribute to my <code>Button</code>. I'm not sure what I'm doing wrong, but Visual Studio says that the attribute was not declared. <code>Android:BorderColor</code> doesn't work either.</p>
  
  <pre><code>The 'BorderColor' attribute is not declared
  </code></pre>
  
  <p>My code : </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="@color/white"&gt;
      &lt;TextView
          android:id="@+id/header"
          android:text="@string/header"
          style="@style/header_text" /&gt;
      &lt;Button
          android:id="@+id/phones_button"
          android:layout_below="@id/header"
          android:layout_alignParentStart="true"
          android:layout_height="100dp"
          android:layout_width="150dp"
          android:textColor="@color/gray"
          android:background="@color/white"
          BorderColor="@color/gray"
          android:text="@string/phones"
          style="@style/button_style" /&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>