Dataset:

DataTable dt1 = new DataTable("Products");
dt1.Columns.Add("ProductId");
dt1.Columns.Add("ProductName");
dt1.Columns.Add("Price");

DataRow dr1 = dt1.NewRow();
dr1[0] = "10000123";
dr1[1] = "Chai";
dr1[2] = 20;
dt1.Rows.Add(dr1);

DataRow dr2 = dt1.NewRow();
dr2[0] = "10000456";
dr2[1] = "Chang";
dr2[2] = 30;
dt1.Rows.Add(dr2);

DataTable dt2 = new DataTable("Orders");
dt2.Columns.Add("Customer");
dt2.Columns.Add("OrderDate");
dt2.Columns.Add("ShipCity");

DataRow dr3 = dt2.NewRow();
dr3[0] = "Hanari Carnes";
dr3[1] = new DateTime(2017, 1, 27).ToShortDateString();
dr3[2] = "Reims";
dt2.Rows.Add(dr3);

DataRow dr4 = dt2.NewRow();
dr4[0] = "Richter Supermarkt";
dr4[1] = new DateTime(2017, 2, 17).ToShortDateString();
dr4[2] = "Resende";
dt2.Rows.Add(dr4);

DataSet ds1 = new DataSet();
ds1.Tables.Add(dt1);
ds1.Tables.Add(dt2);