public void Operation_AppendH_Test01() { var lst1 = nc.GenerateIntSeries(0, 5, 1); var lst2 = nc.GenerateIntSeries(5, 10, 1); var lst3 = new List <object> { 0, 5, 1, 6, 2, 7, 3, 8, 4, 9 }; //create series from the list var ser1 = new Series(lst1); var ser2 = new Series(lst2, name: "Series2"); //addition var df = ser1.AppendHorizontaly(ser2); Assert.Equal(df.Values, lst3); }