/// <summary>
 /// Delete entity from lists
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='listid'>
 /// key: listid of list
 /// </param>
 /// <param name='ifMatch'>
 /// ETag
 /// </param>
 public static void Delete(this ILists operations, string listid, string ifMatch = default(string))
 {
     operations.DeleteAsync(listid, ifMatch).GetAwaiter().GetResult();
 }