The PDFViewer application was developed to be a small tool that will allow you to view PDF files in C# using the Xpdf and muPDF library.The basic idea is create a preview of PDF files in C#. After looking at many places in the internet, I found this wonderful library; the only problem is that the library uses XLib, and there is no XLib available for Windows. Fortunately, Xpdf can render the generated PDF into a Win32 DC.