SqlDataAdapter: Incorrect syntax near order

I Am getting Error "incorrect syntax near Order"

  public DataTable GetOrderId()
        {  
            
            SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConnection"].ToString());
            MyConnection oconnection = new MyConnection();
            
            DataTable dt = new DataTable();
            SqlDataAdapter da = new SqlDataAdapter("select OrderID from Order", connection);
            for (int i = 0; i <= dt.Rows.Count; i++)
            {
                da.Fill(dt);

            }
            return dt;
          }