Simplified Orders Table from Northwind database created in C# as a DataTable

Programmatic-DataTable-Creation.cs

public DataTable GetDataTableSource()
{
    DataTable dataTable = new DataTable();

    dataTable.Columns.Add(new DataColumn("OrderID", typeof(int)));
    dataTable.Columns.Add(new DataColumn("OrderDate", typeof(DateTime)));
    dataTable.Columns.Add(new DataColumn("Freight", typeof(decimal)));
    dataTable.Columns.Add(new DataColumn("ShipName", typeof(string)));
    dataTable.Columns.Add(new DataColumn("ShipCountry", typeof(string)));

    dataTable.PrimaryKey = new DataColumn[] { dataTable.Columns["OrderID"] };

    for (int i = 0; i < 30; i++)
    {
        // or use the following one-liner with the following arguments
        // OrderID, OrderDate, Freight, ShipName, ShipCountry
        //dataTable.Rows.Add(i + 1, DateTime.Now, (i + 1) + (i + 1) * 0.1 + (i + 1) * 0.01, "Name " + (i + 1), "Country " + (i + 1));

        DataRow row = dataTable.NewRow();
        row["OrderID"] = i + 1;
        row["OrderDate"] = DateTime.Now;
        row["Freight"] = (i + 1) + (i + 1) * 0.1 + (i + 1) * 0.01;
        row["ShipName"] = "Name " + (i + 1);
        row["ShipCountry"] = "Country " + (i + 1);

        dataTable.Rows.Add(row);
    }

    return dataTable;
}