public void Flush()

// Insert Cursors are intended for use in CoreHost applications, not Pro Add-ins
public void UsingInsertCursor()
{
    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();
            }
        });
    }
}