Почему компилятор выдает ошибку?

if (winner == true)
            {
                Intent nextActivity = new Intent(this, typeof(layout2));
                StartActivity(nextActivity);
                string win = "";
                if (hod)
                    win = "O";
                else
                    win = "X";
                var txt = FindViewById<TextView>(Resource.Id.textView1);
                txt.Text = win + "Победил";
                hod_count = 0;
                hod = true;
            }