title: How to add PDFsharp lib in C#?
body: <p>I am new to C#.net, I downloaded PDFsharp lib. But how to add this lib to our project?<br>
  My project is to create a PDF file. Please provide me step by step instructions. After unziping it has 32 folders.<br>
  I tried by coping it in my project folder, but same errors come.</p>
  
  <p>"<em>The type or namespace name 'PdfSharp' could not be found (are you missing a using directive or an assembly reference?)"</em></p>