DataBinding to classes

Question

Possible Duplicate:

Binding GridView to Objects

My C# app contains a Data Object like this:

public class Data
 {
    public class a {get;set;}
    public class b {get;set;}
 }

public class a
{
  public int first {get;set;}
}
public class b
{
  public int second{get;set;}
 }

I initialize my data when the application starts and my data changes evey time the app is running.

I have a dataGridView and I want to bind to the first property and to second property. The DataGrid contains two columns, that bound to first and to second property.

How can I do this binding? I don't want to change my dataSource nor do I want to add data.

NOTE: Remember that my data can change every time the app running.