I have a project that I am working on that requires the use of the Mysql Connector for NHibernate, (Mysql.Data.dll). I also want to reference another project (Migrator.NET)
I was also facing the same issue, and was not able to solve by any of the above solution. So finally I found one more solution for this... Remove everything from license.licx file in project=>Properties in solution explorer.
When I removed everything from this file, its allowing me to build the project successfully