How can I load an older version of a .NET assembly?

Question

I have a WPF/C# application that references .NET 4.0 assemblies. However, within the application is a text editor that needs to display C# intellisense tied to .NET 3.5 asse

Answer 1

By default, you cannot load assemblies made for previous versions of the .NET framework on the .NET framework version 4.

However, there is a configuration attribute that allows that: http://msdn.microsoft.com/en-us/library/bbx34a2h.aspx

Put the following lines in your app.config file:

There are reasons why this is not active by default, but I believe that it should be appropriate for your use.