I have a WinForms UserControl that supports DragDrop.  It works great on a 
form.  When I try to host it in IE, I'm running into what I think are 
security issues.  I've worked out most of the problems by Asserting some 
permissions, and using Isolated Storage, but I just can't seem to access the 
file contents of a file that is dropped on the control. (Drag from Outlook to 
the control)  I can get the file names from the FileGroupDescriptor, but when 
I try to get the contents of the file, things get weird:

new UIPermission(UIPermissionClipboard.AllClipboard).Assert();

// Now we need to get the actual raw data
MemoryStream ms = (MemoryStream) e.Data.GetData("FileContents");

After this line of code (no exception is thrown...) If I look at ms the 
debugger has it as <undefined value>.

Any help would be appreciated.

Sean