Hi,

Due to performance issue , i have added the publishing code in thread

 try

                    {

                        HttpontextforMailSending gethttpcontextforpublish2 = new HttpontextforMailSending()

                        {

                            HttpContextReference = HttpContext.Current,

                            courseDocument = shortCourseDocument,

                            createdUser = new User(0)

                        };

                        Thread t2 = new Thread(PublishDocument);

                        t2.Start(gethttpcontextforpublish2);

                    }

                    catch

                    {

                    }

 private void PublishDocument(object input)

        {

            HttpontextforMailSending httpcontextformail = (HttpontextforMailSending)input;

            Document course = httpcontextformail.courseDocument;

            User createduser = httpcontextformail.createdUser;

            if (course != null && createduser != null)

            {

                course.Publish(createduser);

                umbraco.library.UpdateDocumentCache(course.Id);

            }

        }

public class HttpontextforMailSending

    {

        public HttpContext HttpContextReference { get; set; }       

        public Document courseDocument { get; set; }

        public User createdUser { get; set; }

    }

but i got "Object reference not set to an instance of an object" error on "course.Publish(createduser);"

Please anyone help me to solving this.

Thanks

Jeeshna