Hi Andrea,

Based on my understanding, you have a .NET 1.1 WinForms application project
which contains a UserControl called UserControl1. You upgrade this project
to a .NET 2.0 project and create another class that inherits from the
existing UserControl1 in the upgraded .NET 2.0 project. The problem is that
when you open the new UserControl derived from the UserControl1 in the
designer, you get a design time error. If I'm off base, please feel free to
let me know.

I performed a test based on your description, but didn't reproduce the
problem on my side. I can open the new UserControl in the designer without
any error.

In fact, when we open a UserControl in the designer, an instance of the
base class is created. If the base class is not available, the UserControl
won't be opened in the designer correctly.

You may have a try re-creating the UserControl1 in the upgraded .NET 2.0
project  and copying the code in the previous UserControl1 to the new
UserControl to see if the problem still exists.

Hope this helps.

Sincerely,
Linda Liu
Microsoft Online Community Support

==================================================
Get notification to my posts through email? Please refer to
http://msdn.microsoft.com/subscriptions/managednewsgroups/default.aspx#notif
ications.

Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
where an initial response from the community or a Microsoft Support
Engineer within 1 business day is acceptable. Please note that each follow
up response may take approximately 2 business days as the support
professional working with you may need further investigation to reach the
most efficient resolution. The offering is not appropriate for situations
that require urgent, real-time or phone-based interactions or complex
project analysis and dump analysis issues. Issues of this nature are best
handled working with a dedicated Microsoft Support Engineer by contacting
Microsoft Customer Support Services (CSS) at
http://msdn.microsoft.com/subscriptions/support/default.aspx.
==================================================

This posting is provided "AS IS" with no warranties, and confers no rights.