WPF C# issue

Form1.cs


namespace boxes
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        private void button1_Click(object sender, EventArgs e)
        {
            
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            foreach green = new foreach();
            
            
 		textBox4.Text = green.person;


            }


     }
}




looparound.cs



    class foreach
    {

    
        public string person { get; set; }
        
        public void round()
        {
            List<string> demo = new List<string>();

            demo.Add("Bob");
            demo.Add("George");
            demo.Add("Tom");
            demo.Add("Sue");

            foreach (string person in demo)
            {
                person.ToString();
            }


           
        }
    }
}