Need use LIKE %

Question

I use code and work fine

 

var KooperacijaRN = this.radni_nalozi_2018DataGridView.Rows.Cast<DataGridViewRow>().Where(row => row.Cells["R.b. RN"].Value.ToString() == "KO");
            var childCount4 = KooperacijaRN.Count();
            this.BlokiraniRNLabel.Text = childCount4.ToString();

 Need to change line 1 to be LIKE instead ==

 

var KooperacijaRN = this.radni_nalozi_2018DataGridView.Rows.Cast<DataGridViewRow>().Where(row => row.Cells["R.b. RN"].Value.ToString() LIKE "%KO%");

 But this dont work

Please help

Thank you