public static void Main()
Console.WriteLine("Hello World");
var dt = new DataTable();
dt.Columns.Add("NewColumn", typeof(System.Int32));
dt.Columns.Add("NewColumn2", typeof(System.Int32));
dt.Columns.Add("NewColumn3", typeof(System.Int32));
row.ItemArray = new object[] {1, 2, 3};
Console.WriteLine(dt.Rows.Count);
Console.WriteLine(dt.Rows.Count);