title: Xamarin - Add title and button in action bar
body: <p>I am using xamarin.form (Portable) having two project android and ios.</p>
  
  <p>I want to add title in action bar which will change according to detail page also want to add one button in right side in action bar</p>
  
  <p>I refer below link</p>
  
  <p><a href="https://github.com/xamarin/xamarin-forms-samples/tree/master/Navigation/MasterDetailPage" rel="nofollow noreferrer">https://github.com/xamarin/xamarin-forms-samples/tree/master/Navigation/MasterDetailPage</a></p>
  
  <p>This link help me to create navigation page. but not able to add title and button in action bar</p>
  
  <p>Below is image of action bar that I want. Payment is a title which can be change according to detail page and on right side "+" is button</p>
  
  <p><a href="https://i.stack.imgur.com/ArLxi.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ArLxi.png" alt="enter image description here"></a></p>
  
  <p>Please suggest me how can I add title and button in action bar using xamarin form (Portable)</p>