private void OnFormLoad(object sender, EventArgs e)
{
DataSet dataSet1 = new DataSet();
dataSet1.Tables.Add(DataHelper.CreateTable());
dataSet1.Tables.Add(DataHelper.CreateChildTable());
dataSet1.Tables.Add(DataHelper.CreateEmptyTable());
DataColumn keyColumn = dataSet1.Tables[0].Columns["CustomerID"];
DataColumn foreignKeyColumn = dataSet1.Tables[1].Columns["CustomerID"];
dataSet1.Relations.Add("CustomersOrders", keyColumn, foreignKeyColumn);
foreignKeyColumn = dataSet1.Tables[2].Columns["AnyColumn"];
dataSet1.Relations.Add("Customers_AnyDataTable", keyColumn, foreignKeyColumn);
myGridControl1.DataSource = dataSet1.Tables[0];
}