It's indeed possible for you to import pdf and display.you can refer to the follow code to rasteredge.com/how-to/csharp-imaging/pdf-creating/:namespace RE__Test

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        public static string FolderName = "c:/";

        private void button1_Click(object sender, EventArgs e)

        {

            string fileName = FolderName + "SampleNew.pdf";

            PDFDocument pdf = new PDFDocument(5);

            REFile.SaveDocumentFile(pdf, fileName, new PDFEncoder());//save new pdf

Yes ,there is a way to load external images NOT INTO THE ACTUAL APPLICATION but externally from a folder at runtime.you can refer to follow method:

public static REDocument OpenDocumentFile(string filePath);

public static REDocument OpenDocumentFile(string filePath, BaseDecoder dec);

public static REImage OpenImageFile(string filePath);

public static REImage OpenImageFile(string filePath, BaseDecoder dec);http://www.rasteredge.com/how-to/csharp-imaging/load-from-file/