Get per 20 items from list and iterate in c#

            int myCount = 0;

            while (myCount < ssummarys.Count)

           {
                var twentyItems = ssummarys.Skip(myCount).Take(20);
                foreach (SSUMMARY ssummary in twentyItems)
                {
                     #region Do something

                     #endregion                    

                }
               
                myCount = myCount + 20;

            }