Compare old and new record for logging c#

You have an old record, and the new one to be saved to database. Generate a log of the changes made using this snipped.

string logmessage = "The Doc Repo Category " + oldDocCatTitle + " has been edited.";
                logmessage += (oldDocCatTitle != DocCatTitle) ? "The title changed from " + oldDocCatTitle + " to " + DocCatTitle + "." : "";
                logmessage += (oldDocCatDesc != DocCatDesc) ? "The description changed from " + oldDocCatDesc + " to " + DocCatDesc + "." : "";
                logmessage += (oldDocCatShared != DocCatShared) ? "The shared changed from " + oldDocCatShared.ToString() + " to " + DocCatShared.ToString() + "." : "";
                logmessage += (oldDocCatShowOnHome != DocCatShowOnHome) ? "The description changed from " + oldDocCatShowOnHome.ToString() + " to " + DocCatShowOnHome.ToString() + "." : "";
                if (oldDocCatTitle != DocCatTitle || oldDocCatDesc != DocCatDesc || oldDocCatShared != DocCatShared || oldDocCatShowOnHome != DocCatShowOnHome || oldDocCatLink != DocCatLink)
                {
                    bool addLog = dataProcessing.addLog(Session["adminSID"].ToString(), "", logmessage, out string logMessage);
                }