The type initializer for 'NHibernate.Cfg.Configuration' threw an exception
nhibernate
Solution
I had the same problem. The actual reason was i used a library that used old version of log4net. NHibernate tries to use it if find. So i had to force it to use (or actually not use) other logger by adding such line: LoggerProvider.SetLoggersFactory(new NoLoggingLoggerFactory());
Problem
After upgrading from nhibernate 1.0.4.0 to nhibernate 3.3 im encountering the following error when I try to run "Configuration cfg = new Configuration();" ``` System.TypeInitializationException was caught Message="The type initializer for 'NHibernate.Cfg.Configuration' threw an exception." Source="NHibernate" TypeName="NHibernate.Cfg.Configuration" StackTrace: at NHibernate.Cfg.Configuration..ctor() at KEH.Web.Data.NHibernateUtil..cctor() in F:\Projects\KEH nHibernate\KEHWeb\Data\Data\NHibernateUtil.cs:line 24 InnerException: System.NotSupportedException Message="The invoked member is not supported in a dynamic assembly." Source="mscorlib" StackTrace: at System.Reflection.Emit.AssemblyBuilder.get_Location() at log4net.Util.SystemInfo.AssemblyLocationInfo(Assembly myAssembly) at log4net.Core.DefaultRepositorySelector.GetInfoForAssembly(Assembly assembly, String& repositoryName, Type& repositoryType) at log4net.Core.DefaultRepositorySelector.CreateRepository(Assembly repositoryAssembly, Type repositoryType, String repositoryName, Boolean readAssemblyAttributes) at log4net.Core.DefaultRepositorySelector.CreateRepository(Assembly repositoryAssembly, Type repositoryType) at log4net.Core.DefaultRepositorySelector.GetRepository(Assembly repositoryAssembly) at log4net.Core.LoggerManager.GetLogger(Assembly repositoryAssembly, String name) at log4net.LogManager.GetLogger(Assembly repositoryAssembly, String name) at log4net.LogManager.GetLogger(Type type) at lambda_method(ExecutionScope , Type ) at NHibernate.Log4NetLoggerFactory.LoggerFor(Type type) at NHibernate.LoggerProvider.LoggerFor(Type type) at NHibernate.Cfg.Configuration..cctor() InnerException: ``` Any help would be greatly appreciated. The NHibernateUtil class code is as follows : ``` public class NHibernateUtil { private static readonly Configuration cfg; private static readonly ISessionFactory sessionFactory; private static readonly ILog logger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); static NHibernateUtil() { try { logger.Debug("Before Initializing NHibernate"); cfg = new Configuration(); cfg.AddAssembly("KEH.Web.Data"); sessionFactory = cfg.BuildSessionFactory(); logger.Debug("Initialized NHibernate"); } catch (Exception ex) { Console.WriteLine(ex.Message); } } public static ISession OpenSession() { logger.Debug("Before Getting Connection"); return sessionFactory.OpenSession(); } } ```