1. Recompile the source code
2. If you dont have source code you can add a simple assemblyBinding tag under configuration in your web.config/app.config
For example I am using NHibernate.Validator dll which depends on NHibernate and was build with older version of NHibernate "2.1.2.4000". But in my project I have newer NHibernate version "3.0.0.2001". So i am getting the below exception
Could not load file or assembly 'NHibernate, Version=2.1.2.4000, Culture=neutral, PublicKeyToken=aa95f207798dfdb4' or one of its dependencies
To resolve this issue all i have to do is to add the below assemblyBinding configuration
More can be find at
http://msdn.microsoft.com/en-us/library/2fc472t2%28VS.71%29.aspx
