Button in DataGridView with condition C#

Question

I want to ADD button to a column in DataGridView...But with a condtion : just when the color of the ROW is RED, This is datagridview:

Now, all the button in Column 'Check-Out' work...with the Red Row or the White Row...my code:

int row = (int)this.dataGridView1.CurrentCell.OwningRow.Cells[0].Value;

            if (MessageBox.Show("Check-out?",
                              "Message de confirmation",
                              MessageBoxButtons.YesNo) == DialogResult.Yes)
            {    MessageBox.Show("Success!!");
}

For just the button work with Red ROW, I try this code :

 if (dataGridView1.SelectedRows[0].DefaultCellStyle.BackColor == Color.Red)
        {
            int row = (int)this.dataGridView1.CurrentCell.OwningRow.Cells[0].Value;

            if (MessageBox.Show("Check-out?",
                              "Message de confirmation",
                              MessageBoxButtons.YesNo) == DialogResult.Yes)
            {MessageBox.Show("Success!!");
}

I have ERROR: The index was off limits. It must not be negative and must be less than the size of the collection. in line:

 if (dataGridView1.SelectedRows[0].DefaultCellStyle.BackColor == Color.Red)

ERROR:

Thanks,

Answer 1

I find the correct answer: I should modifie the line :

if (dataGridView1.SelectedRows[0].DefaultCellStyle.BackColor == Color.Red)

with :

 if(dataGridView1.CurrentRow.DefaultCellStyle.BackColor==Color.Red)

So we use DataGridView.CurrentRow