title: Setting up DataGridView with subrows when row is selected
body: <p>I am doing a WinForms app for personal use. In this app, I have a <code>DataGridView</code> in which I display some data from a database. Lets say this data is about a person like first &amp; last names, date of birth, adress, etc.</p>
  
  <p>Then, each person can have orders. These orders split up into description, quantity, price, total price.</p>
  
  <p>What I want is a <code>DataGridView</code> that looks something like this:</p>
  
  <p><img src="https://i.stack.imgur.com/DT5QF.png" alt="enter image description here"></p>
  
  <p>I searched the web but could only find custom controls that were paid. As I am doing this for a learning project, I want to stay in the free range.</p>