How can I add rows to a DataGridView control in C#?

I have created 3 colum开发者_如何学运维ns on a DataGridView control, but I don't know how to add rows. Please help.

Possibly a duplicate of:
How to add data to DataGridView
or
how to add row to datagridview
or
How to add rows and columns to a DataGrid?
or
How can I add one row to a DataGridView?

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This is just off the top of my head..

DataRowItem dr = DataGrid.NewRow();

DataGrid.Items.Add(dr);