my xml

  <RelativeLayout
    android:id="@+id/InnerRelativeLayout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true">

  <TextView
   android:id="@+id/textopie"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:text="| SERVICIOS QR DERECHOS RESERVADOS ® 2015 |"
   android:textColor="#000"
   android:textSize="8sp" 
   android:background="#F0F0F0"
   android:gravity="center"/>

  </RelativeLayout>

my xaml

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="#FFFFFF">
        <include
            layout="@drawable/footer" />
        <include
            android:id="@+id/encabezado"
            layout="@drawable/header" />
        </RelativeLayout>
    </RelativeLayout>

my code c#

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        Window.RequestFeature(WindowFeatures.NoTitle);
        SetContentView(Resource.Layout.relog);
        View view = FindViewById(Resource.Id.encabezado); <--- Resource not find
    }