Is there a way in C# to constantly check throughout the run time of a program if a value is a specific number

I am making a game of monopoly in c# and i have a dice roll but when i try to change one picturebox's colour on the board which represents a square where the player can be it will not change or display a string telling the user they have landed on a community chest for example. Like in the image i have provided player 1 is currently at position 17 which is the community chest, the picture box on that square should turn blue and there should be an announcement where the 6 is displayed telling the user to click the community chest button.

private void button2_Click(object sender, EventArgs e)
        {
            if (((P1Pos == 2) || (P2Pos == 2) || (P3Pos == 2) || (P4Pos == 2)) && ((P1Pos == 17) || (P2Pos == 17) || (P3Pos == 17) || (P4Pos == 17)) && ((P1Pos == 33) || (P2Pos == 33) || (P3Pos == 33) || (P4Pos == 33)))
            {
                label13.Text = "You have landed on a community chest. Please click the chest button.".ToString();
            }
            Random rnd = new System.Random();
            int Dice = rnd.Next(1, 12);
            label14.Text = Dice.ToString();     //Rolling the dice

            if (CurrentPlayer == "Player 1")
            {
                label15.Text = (int.Parse(label15.Text) + Dice).ToString(); // Adding the roll number to the current piece position 
                P1Pos = int.Parse(label15.Text);
                if (P1Pos > 40)
                {
                    P1Pos = P1Pos - 40;
                    label15.Text = P1Pos.ToString(); // Checking if the piece is at 40 and taking 40 away as it is the biggest square number
                }

                CurrentPlayer = "Player 2";
                NextPlayer = "Player 3";
                return;
            }
            if (CurrentPlayer == "Player 2")
            {
                label22.Text = (int.Parse(label22.Text) + int.Parse(label14.Text)).ToString();
                P2Pos = int.Parse(label22.Text);
                if (P2Pos > 40)
                {
                    P2Pos = P2Pos - 40;
                    label22.Text = P2Pos.ToString(); // Checking if the piece is at 40 and taking 40 away as it is the biggest square number
                }
                CurrentPlayer = "Player 3";
                NextPlayer = "Player 4";
                return;
            }
            if (CurrentPlayer == "Player 3")
            {
                label16.Text = (int.Parse(label16.Text) + int.Parse(label14.Text)).ToString();
                P3Pos = int.Parse(label16.Text);
                if (P3Pos > 40)
                {
                    P3Pos = P3Pos - 40;
                    label16.Text = P2Pos.ToString(); // Checking if the piece is at 40 and taking 40 away as it is the biggest square number
                }
                CurrentPlayer = "Player 4";
                NextPlayer = "Player 1";
                return;
            }
            if (CurrentPlayer == "Player 4")
            {
                label21.Text = (int.Parse(label21.Text) + int.Parse(label14.Text)).ToString();
                P4Pos = int.Parse(label21.Text);
                if (P4Pos > 40)
                {
                    P4Pos = P4Pos - 40;
                    label21.Text = P4Pos.ToString(); // Checking if the piece is at 40 and taking 40 away as it is the biggest square number
                }
                CurrentPlayer = "Player 1";
                NextPlayer = "Player 2";
                return;
            }

            if (((P1Pos == 2) || (P2Pos == 2) || (P3Pos == 2) || (P4Pos == 2)) && ((P1Pos == 17) || (P2Pos == 17) || (P3Pos == 17) || (P4Pos == 17)) && ((P1Pos == 33) || (P2Pos == 33) || (P3Pos == 33) || (P4Pos == 33)))
            {
                label14.Text = "You have landed on a community chest. Please click the chest button.";
            }

            if ((P1Pos == 17) || (P2Pos == 17) || (P3Pos == 17) || (P4Pos == 17))
            {
                label14.Text = "You have landed on a community chest. Please click the chest button.";
            }
            if ((P1Pos == 33) || (P2Pos == 33) || (P3Pos == 33) || (P4Pos == 33))
            {
                label14.Text = "You have landed on a community chest. Please click the chest button.";
            }
        }