The following code is an exmaple which explains how to add a new row to the DataGridView binds to a DataTable.
Code Snippet
// DataGridView will generate a new row automatically
SampleDataSet.CustomersRow newCustomersRow = sampleDataSet.Customers.NewCustomersRow();
newCustomersRow.CustomerID = "1234-123";
newCustomersRow.CompanyName = "Sample Works";
sampleDataSet.Customers.Rows.Add(newCustomersRow);
Regards Ruban.J