title: java.lang.RuntimeException and java.lang.classNotFoundException
body: <p>I have two activities (MainActivity and SeconActivity): </p>
  
  <pre><code>namespace App16
  {
      [Activity(Label = "App16", MainLauncher = true, Icon = "@drawable/icon")]
      public class MainActivity : Activity
      {
  
          protected override void OnCreate(Bundle bundle)
          {
              base.OnCreate(bundle);
  
              // Set our view from the "main" layout resource
              SetContentView(Resource.Layout.Main);
  
              // Get our button from the layout resource,
              // and attach an event to it
              Button button = FindViewById&lt;Button&gt;(Resource.Id.MyButton);
  
              button.Click += delegate
              {
  
                  var activity2 = new Intent(this, typeof(SecondActivity)).SetFlags(ActivityFlags.ReorderToFront);
                  //var activity2 = new Intent(this, typeof(EnglishWord));
                  activity2.PutExtra("MyData", "Clicked");
                  StartActivity(activity2);
              };
          }
      }
  }
  </code></pre>
  
  <p>and:</p>
  
  <pre><code>namespace App16
  {
      [Activity(Label = "SecondActivity")]
      public class SecondActivity : Activity
      {
          Button button;
          protected override void OnCreate(Bundle savedInstanceState)
          {
              base.OnCreate(savedInstanceState);
  
              SetContentView(Resource.Layout.Main2);
              //Toast.MakeText(this, "Hello", ToastLength.Short).Show();
              string text = Intent.GetStringExtra("MyData") ?? "Data not available";
              //string text = Intent.GetStringExtra("MyData");
              Toast.MakeText(this, text, ToastLength.Long).Show();
              button.Text = text;
          }
      }
  }
  </code></pre>
  
  <p>and AndroidManifest.xml file:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="App16.App16" android:versionCode="1" android:versionName="1.0"&gt;
    &lt;uses-sdk android:minSdkVersion="16" /&gt;
    &lt;application android:label="App16"&gt;
      &lt;activity
    android:name=".MainActivity" &gt;
        &lt;intent-filter &gt;
          &lt;action android:name="android.intent.action.MAIN" /&gt;
          &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
        &lt;/intent-filter&gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".SecondActivity" &gt;
      &lt;/activity&gt;
    &lt;/application&gt;
  &lt;/manifest&gt;
  </code></pre>
  
  <p>I have this Error:</p>
  
  <blockquote>
    <p>java.lang.runtimeexception: unable to instantiate activity componentInfo {app16.app16/app16.app16.mainactivity}: java.lang.classnotfoundexception: Did not find class "app16.app16.mainactivity" on path:/data/app/app16.app16-1.apk </p>
  </blockquote>
  
  <p>With <code>android:name="App16.App16.MainActivity"</code> I do not have any output in emulator.</p>