Boucle

slt, on m'appelle tarmac. je programme sur un datagridview qui, quand je click sur une cell et change de couleur, alors je veux un boucle qui verifie que lorsqu'il ya 7 cell selectionné, mon button soit visible = true parce qu'au paravant il etait visible false.

voila le code:

DataGridViewCellStyle CellStyle = new DataGridViewCellStyle();
            if (dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Style.BackColor == Color.OrangeRed)
                //&& (e.ColumnIndex) < 1)
            {

                DataGridViewRow ligne = dataGridView1.Rows[e.RowIndex];
                        CellStyle.BackColor = Color.White;
                        CellStyle.SelectionBackColor = Color.White;
                        CellStyle.SelectionForeColor = Color.Black;
                        dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Style = CellStyle;
                  
            }
            else
            {
               
                 DataGridViewRow row = dataGridView1.Rows[e.RowIndex];
                 foreach (DataGridViewCell celluleligne in row.Cells)
                 {
                     if (celluleligne.Style.BackColor == Color.OrangeRed)
                     {
                         celluleligne.Style.BackColor = Color.White;

                         CellStyle.BackColor = Color.OrangeRed;
                         CellStyle.SelectionBackColor = Color.OrangeRed;
                         CellStyle.SelectionForeColor = Color.Black;
                         dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Style = CellStyle;

I need a help please