Convert Image to PDF using C# and VB.Net in ASP.Net MVC

How do i convert a jpg/png/txt or any file format to pdf using mvc c#. Here is the code:

        public ActionResult SaveProfileDocument(string code)
        {
            bool isSavedSuccessfully = true;
            string fName = "";
            string _documentname = String.Empty;

            try
            {
                foreach (string fileName in Request.Files)
                {
                    HttpPostedFileBase file = Request.Files[fileName];
                    //Save file content goes here
                    fName = file.FileName;
                    if (file != null && file.ContentLength > 0)
                    {

                        var originalDirectory = new DirectoryInfo(string.Format("{0}Documents\\Profile\\" + code, Server.MapPath(@"\")));

                        string pathString = System.IO.Path.Combine(originalDirectory.ToString());

                        var fileName1 = Path.GetFileName(file.FileName);

                        bool isExists = System.IO.Directory.Exists(pathString);

                        if (!isExists)
                            System.IO.Directory.CreateDirectory(pathString);

                        _documentname=fName;

                        var path = string.Format("{0}\\{1}", pathString, file.FileName);
                        if (System.IO.File.Exists(path)) {
                            _documentname=Guid.NewGuid()+"_"+file.FileName;

                            var path2 = string.Format("{0}\\{1}", pathString,_documentname );
                            file.SaveAs(path2);
                        }
                        else {
                            file.SaveAs(path);
                        }

                    }

                }

            }
            catch (Exception ex)
            {
                isSavedSuccessfully = false;
            }


            if (isSavedSuccessfully)
            {
                return Json(new { Message = fName, documentname = _documentname });
            }
            else
            {
                return Json(new { Message = "Error in saving file", documentname=""});
            }
        }

In the above code i am saving the file.but here i need to convert the file and then save.

so for convert i need a separate class or method here only call that method.

The thing is that while upload a file inthat time need to convert pdf any file to convert pdf. and save in folder or whatever.