.NET 1.1 DataGrid: Showing public properties with an Interface Type of objects in an IList

[mvanroshum]

Hi,

I have the following problem:
The DataSource of a DataGrid can be set to an IList. The DataGrid
nicely lists the objects in the IList,
showing all the public properties of the objects as the columns of the
datagrid...
The public properties with a primitive type are shown
The public properties with userdefined types are also shown, using the
eventually overridden ToString method.
But...... when the Design-Time type is an interface type, the datagrid
is not showing the ToStrings value of that property, eventhough using
the debugger the runtime type shows an instance of the concrete class.
Does anyone knows the reason of this behaviour and a solution for it?
(e.g. how to make the DataGrid discover the overridden ToString method
of the concrete instance of the Interface Type)

An example (note: the only usage of IMyStructure is with the property
MyListRecord.Structure, the
private member MyListRecord.structure is of type MyStructure (the
class-type, not the interface-type)

public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

IList il = new ArrayList();
MyStructure ms1 = new MyStructure();
ms1.X = 10;

MyStructure ms2 = new MyStructure();
ms2.X = 15;

MyListRecord mlr1 = new MyListRecord();
mlr1.Structure = ms1;
mlr1.Name = "Record1";

MyListRecord mlr2 = new MyListRecord();
mlr2.Structure = ms2;
mlr2.Name = "Record2";

il.Add(mlr1);
il.Add(mlr2);

this.dataGrid1.DataSource = il;
}

public class MyListRecord
{
private string name;
private MyStructure structure;

public MyListRecord()
{
//
// TODO: Add constructor logic here
//
}

public string Name
{
get { return name; }
set { name = value; }
}

public IMyStructure Structure
{
get { return structure; }
set { structure = (MyStructure) value; }
}
}
public class MyStructure : IMyStructure
{

int x;

public int X
{
get { return x; }
set { x = value; }
}

public override string ToString()
{
return String.Format("X: {0}", x);
}
}

Thanx in advance ,
Marco