Fixing assembly version conflicts in .net with AsmSpy

Occasionally you will get assembly version conflicts when building / running .net projects. Here is a quick overview of how to fix



Using AsmSpy

Using AsmSpy is the easiest way to find assembly version conflicts.

Get it from: https://github.com/mikehadlow/AsmSpy

Run it on the build output directory. E.g.
  AsmSpy c:\Projects\SomeProject\bin\Debug

It will display a list of references and the assemblies that use them.


For example

Reference: log4net
   1.2.13.0 by ABCD
   1.2.13.0 by XYZ
   1.2.12.0 by EEE

Here you can see that EEE is expecting a lower version of log4net that the rest of the assemblies.

This makes it very easy to spot the errors. 


Checking for errors manually

You can also manually check for errors by looking at the output window after a build. Using AsmSpy is a lot easier though