Add rows, enter data in datagridview on button click

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C#

C#4.0

I am using a datagridview in my apps and having a button to add a new row to datagridview, for that I've set AllowUserToAddRows to true on ADD button click event. I want the focus to be on that newly added row and able to enter some data, as of now my ReadOnly property is set to false and that of editmode is on KeyStroke
Can anyone help me to proceed further and I'm really getting struck over here and could not proceed since can do further only if this works

I'm able to add a new row on button click ADD(AllowUserToAddRows = true) on click event, I set the read only property of column to false and was able to enter data in the newly added row.
and able to set the focus to newly added row

dgDtParameters.Rows[dgDtParameters.Rows.Count - 1].Selected = true;

removed the focus of datagridiview by adding
ClearSelection()