title: How can I create a pop-up notification in Telegram bot?
body: <p>I´m developing a telegram bot in c#. 
  Using the class <code>TelegramBotClient</code> in <code>Telegram.Bot</code> library. </p>
  
  <p>I want to create a pop-up notification after click on a <code>InlineKeyboardButton</code>. </p>
  
  <p>Does anyone know how to do it?
  Thank you very much.</p>
  
  <p>I want to create something similar to this image:</p>
  
  <p><a href="https://i.stack.imgur.com/0lSAk.png" rel="noreferrer"><img src="https://i.stack.imgur.com/0lSAk.png" alt="enter image description here"></a></p>