DXRichEdit for Silverlight: How to use the RichEditDocumentServer to load file, modify it and save it in a different format

This example illustrates a simple use of RichEditDocumentServer.
After clicking the "Load a file" button it loads a file in Word 97-2003 format (DOC) , retrieves all images, displays them as a slide show and fills the text block with a plain text of the document.
After clicking the "Save a file" button, a custom text is inserted into the document's footer and the document is saved in OpenXml format (DOCX).