How to use Datatable in c#

/// <summary>
    /// This example method generates a DataTable.
    /// </summary>
    static DataTable GetTable()
    {
	//
	// Here we create a DataTable with four columns.
	//
	DataTable table = new DataTable();
	table.Columns.Add("Dosage", typeof(int));
	table.Columns.Add("Drug", typeof(string));
	table.Columns.Add("Patient", typeof(string));
	table.Columns.Add("Date", typeof(DateTime));

	//
	// Here we add five DataRows.
	//
	table.Rows.Add(25, "Indocin", "David", DateTime.Now);
	table.Rows.Add(50, "Enebrel", "Sam", DateTime.Now);
	table.Rows.Add(10, "Hydralazine", "Christoff", DateTime.Now);
	table.Rows.Add(21, "Combivent", "Janet", DateTime.Now);
	table.Rows.Add(100, "Dilantin", "Melanie", DateTime.Now);
	return table;
    }
}