Event Receiver
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/403c001b-b720-4b12-bb5c-6b95c9fbaf89/how-to-get-column-values-on-item-added-event-receiver?forum=sharepointdevelopmentprevious https://www.red-gate.com/simple-talk/dotnet/net-tools/managing-itemupdating-and-itemupdated-events-firing-twice-in-a-sharepoint-item-event-receiver/ https://docs.microsoft.com/en-us/previous-versions/office/developer/sharepoint-2010/ff521580(v%3Doffice.14) https://sharepoint.stackexchange.com/questions/216386/add-new-itemeventreceiver-methods-in-visual-studio-on-top-of-existing-event-rece https://docs.microsoft.com/en-us/sharepoint/dev/sp-add-ins/handle-list-item-events-in-the-provider-hosted-add-in using ( SPSite originalsite = new SPSite ( properties . SiteId , properties . OriginatingUserToken )) { //To get the current user using ( SPWeb web = originalsite . OpenWeb ()) { string strUserName = web . CurrentUser . LoginName . ToString (); } }