restrict editable option for some columns in Datagridview

private System.Windows.Forms.DataGridViewTextBoxColumn Column1;

        private void Form1_Load(object sender, EventArgs e)
        {

            this.dataGridView1.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
            this.Column1});
            // Column1
            //
            this.Column1.HeaderText = "Column1";
            this.Column1.Name = "Column1";
            this.Column1.ReadOnly = true;
        }