Using ReadOnly with a DataGridView?

The following code isn't working:

dataGridView1.ReadOnly = True
dataGridView1.Columns(1).ReadOnly = False

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The above code doesn't allow me to enter data manually in Column 1 of the dgv.

I have a dgv that contains 15 columns and I only want to 2 of them to be able to enter data manually. I'm doing the above method just to save lines of code (not that big of deal really). Just wondered if there was a way of doing this without having to set all the Columns.ReadOnly = True?

Thanks!