Fluent NHibernate: System.TypeLoadException: Inheritance security rules violated while overriding member

See more:

C#

.NET

C#4.0

.NET4

NHibernate

, +

Hi,

I'm using Fluent NHibernate in my ASP.Net project. While on my machine everything works fine, when I publish my project to my hosting server, I'm having some issues.

Below is the code that I'm using:

try
{
	var db = MsSqlConfiguration.MsSql2008.ConnectionString(_connStr);

	_sessionFactory = Fluently.Configure()
							  .Database(db)
							  .Mappings(c => c.FluentMappings.AddFromAssembly(System.Reflection.Assembly.GetExecutingAssembly()))
							  .ExposeConfiguration(c => c.SetProperty("hbm2dll.keywords", "auto-quote"))
							  .BuildSessionFactory();
}
catch (Exception ex)
{
	_log.Error("Error during session factory initialization. Error message: " + ex.Message);
	_log.Error("Full Error Details: " + ex.ToString());
	return false;
}

When I'm running the above code on the hosting server, I'm getting the following error:

01/12/2015 12:07:35:585 - ERROR: Error during session factory initialization. Error message: Inheritance security rules violated while overriding member: 'FluentNHibernate.Cfg.FluentConfigurationException.GetObjectData(System.Runtime.Serialization.SerializationInfo, System.Runtime.Serialization.StreamingContext)'. Security accessibility of the overriding method must match the security accessibility of the method being overriden.
01/12/2015 12:07:35:585 - ERROR: Full Error Details: System.TypeLoadException: Inheritance security rules violated while overriding member: 'FluentNHibernate.Cfg.FluentConfigurationException.GetObjectData(System.Runtime.Serialization.SerializationInfo, System.Runtime.Serialization.StreamingContext)'. Security accessibility of the overriding method must match the security accessibility of the method being overriden.
   at FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory()
   at NIPDBHandler.CDataAccessLayer.Init() in CDataAccessLayer.cs:line 32

Now I know that there was a known issue in Fluent NHiberate in the method "FluentNHibernate.Cfg.FluentConfigurationException.GetObjectData" in .NET 4.0. Basically, the problem was that the mentioned method was not decorated with the attribute "[SecurityCritical]". I am 100% sure that the said method is decorated with the said attribute. I'm using FluentNHibernate version 2.0.1.0 and I used ILSpy to check that the method is really decorated and, in fact, it was decorated with the "[SecurityCritical]" attribute.

I've also tried adding the following line to the assembly file of FluentNHibernate and recompiled everything.

[assembly: System.Security.SecurityRules(System.Security.SecurityRuleSet.Level1)]

This time, the only difference that I saw was that the configuration was taking a long time to complete, resulting in ThreadBeingAborted exception from the .aspx page.

Any help would be greatly appreciated because I honestly don't know what I'm doing wrong.

Thanks in advance!