public void Flush()

{
  // Insert Cursors are intended for use in CoreHost applications, not Pro Add-ins
  await QueuedTask.Run(() =>
  {
    using (Geodatabase geodatabase = new Geodatabase(new DatabaseConnectionFile(new Uri("path\\to\\sde\\file"))))
    using (Table citiesTable = geodatabase.OpenDataset<Table>("name\\of\\cities_table"))
    {
      geodatabase.ApplyEdits(() =>
      {
        using (InsertCursor insertCursor = citiesTable.CreateInsertCursor())
        using (RowBuffer rowBuffer = citiesTable.CreateRowBuffer())
        {
          rowBuffer["State"] = "Colorado";

          rowBuffer["Name"] = "Fort Collins";
          rowBuffer["Population"] = 167830;
          insertCursor.Insert(rowBuffer);

          rowBuffer["Name"] = "Denver";
          rowBuffer["Population"] = 727211;
          insertCursor.Insert(rowBuffer);

          // Insert more rows here
          // A more realistic example would be reading source data from a file

          insertCursor.Flush();
        }
      });
    }
  });
}