Library for creating PDF from Different file types

Basically I need a library that converts any of these types: css-styled .html .doc .docx .txt .jpeg .jpg .png .gif .bmp to PDF, so basically the input might be one or more files of these types and the output should be one PDF file. One more thing: If the input is a .bmp file, the image should be compressed before the pdf conversion, to keep the file size of the generated pdf as small as possible. It should work under mono as .net web project, and should be in c#. Thank you