using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            bindingSource1.DataSource = Class1.Instance;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Class1.Instance.MyProperty = "Jhoiheofcjwp";
        }
    }


    public class Class1 : INotifyPropertyChanged
    {
        private Class1() { }

        private static Class1 instance;
        public static Class1 Instance
        {
            get
            {
                if (instance == null) instance = new Class1();
                return instance;
            }
        }


        private string myProperty = "Hallo";
        public string MyProperty
        {
            get { return myProperty; }
            set { myProperty = value; OnPropertyChanged(); }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

    }
}