DataTable:
 
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);