Form.restoredWindowBounds

[Zohar]

Hi
I am trying to get the RestoredSize of a Form, but the Form class has no property for it..
But it does have a private field:
private Rectangle restoredWindowBounds;
(I found it via using Reflector)

I am trying to get the value of that field,
I put the following 2 lines in the Form Load event of the Form:
Type T=this.GetType();
FieldInfo FI=T.GetField("restoredWindowBounds",BindingFlags. NonPublic|BindingFlags.Instance);

but I get FI to be null..
If it wouldn't have been null, I could do FI.GetValue();

What can I do to make this work so I can get the RestoredSize right?
Thank you very much

Zohar