How to Change Target API Version in Visual Studio Xamarin
<p>My VS worked well before I synchronized my project with my friend's using GitHub. After that, somehow I notice Visual Studio targets different location to android.jar file. So, whenever I compile my code, I receive the following error.</p>

<blockquote>
  <p>Could not find android.jar for API Level 24. This means the Android
  SDK platform for API Level 24 is not installed. Either install it in
  the Android SDK Manager (Tools > Open Android SDK Manager...), or
  change your Xamarin.Android project to target an API version that is
  installed.
  (C:\Users\Joshua\AppData\Local\Xamarin\MonoForAndroid\AndroidSDK\platforms\android-24\android.jar
  missing.)</p>
</blockquote>

<p><code>C:\Users\Joshua\AppData\Local\Xamarin\MonoForAndroid\AndroidSDK\platforms\android-24\android.jar</code> is a directory location in my friend's drive.</p>

<p>How to change the target location of that <em>android.jar</em> file in VS 2015?</p>