title: How to insert a shape in a powerpoint slide using OpenXML
body: <p>This question could seem rather basic, but how do I insert a shape (i. e. a rectangle) in a slide using OpenXML in c#?</p>
  
  <p>I've searched around and all I see is "create a slide with the shape and use the SDK Productivity Tool to reflect the code. That's not really helpful :(</p>