DataBind listBox to List

See more:

C#

I have a listbox that I've binded to a List<t> collection object but when I make changes in the List<t> object it's not being reflected in the my listbox. What am I doing wrong here?

Oh, by the way I'm using windows form. Here's my code:

class MyDataObject
{
   List<string> data;

   public MyDataObject()
   {
      data = new List<string>() {"abc","rst","xyz"};
   }

   public List<string> Data
   {
     get{return data;}
     set{data = value;}
   }
}


// Windows Form section

MyDataObject datObj = MyDataObject();

public Form()
{
   Initialization();
  
   listbox1.DataSource = datObj.Data;
   listbox1.DisplayMember = "Data";
}

void button1_Click(object sender, EventArgs e)
{
  string newData = textbox1.Text;
  datObj.Data.Add(newData);

  listbox1.Refresh();
}
</string></string></string>

The listbox initially shows the dataObj's Data items but when I add new data to the textbox and pass it to my dataObject and click button1 it's not displaying in my listbox which I thought was binded to my datObj's Data memeber?