C# “System” version update

Question

I'm in C# in Visual Studio running 2015 Update 3.

I'm using a dll that I made myself for the backend of a system, and in the references of the project, one shows the "System" as Version 2.0.5 and the project being used as a dll shows it as 4.0.0. I believe this is the cause of a conflict that is preventing me from running this app. How do I update just the system version or even specify it so I can make them the same?

Answer 1

I think you should go to the references of your project containing the old reference, remove System and add it with version 4.0.0.0. However, you should also check that target .NET framework versions match (maybe the older dll is obtained compiling against .NET framework 2.0 and the newest one against .NET framework 4.0).

In order to find out the cause that is preventing you from running the application (you should provide what is happening), an useful tool is Assembly Binding Log Viewer which will show the exact assemblies that the application is trying to load (fully qualified assembly names).