Cancel “Publish Major Version” for a Document Library

public class CancelPublishMajorVersionTest : SPItemEventReceiver
    {
        private HttpContext current;
        public CancelPublishMajorVersionTest () : base()
        {
            current = HttpContext.Current;
        }
 
        public override void ItemUpdating(SPItemEventProperties properties)
        {
            base.ItemUpdating(properties);
         
            if (current != null)
            {
                //check if request is coming from the MS office not from the browser
                if ((current.Request != null && current.Request.CurrentExecutionFilePath != null && current.Request.CurrentExecutionFilePath.IndexOf("_vti_bin") > -1) || (current.Request.CurrentExecutionFilePath.Equals("/_layouts/checkin.aspx")))
                {
                    String sLevel = Convert.ToString(properties.AfterProperties["vti_level"]);
                    //2 for Publish as major version and 1 for Checkin as major version
                    if (sLevel == "2" || sLevel == "1")
                    {
                        properties.Status = SPEventReceiverStatus.CancelWithError;
                        properties.ErrorMessage = "Publish Major Version not allows";
                        properties.Cancel = true;
                    }
                }
            }
        }
    }