public Form1()
{
InitializeComponent();
DataInstance = new MyData() { Number = 100 };
this.bindingSource1.DataSource = DataInstance;
this.bindingSource1.DataSourceChanged += bindingSource1_DataSourceChanged;
}
private void button1_Click(object sender, EventArgs e)
{
this.DataInstance = new MyData() { Number = 200 };
this.bindingSource1.DataSource = DataInstance;
this.bindingSource1.ResetBindings(false);
}