Something

Unhandled Exception: System.Runtime.Remoting.RemotingException: Cannot cast from client type 'Infoman.Tukia.RepeatRelation`1[[Infoman.Tukia.LangNamePair, LibTukia, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null]], LibTukia, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' to server type 'Infoman.Tukia.RepeatRelation`1[[Infoman.Tukia.LangNamePair, LibTukia, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null]]'

Server stack trace: 
in <0x00138> System.Runtime.Remoting.Messaging.MethodCall:ResolveMethod ()
in <0x0007e> System.Runtime.Remoting.Messaging.MethodCall:.ctor (System.Runtime.Remoting.Messaging.Header[] headers)
in <0x005e6> System.Runtime.Serialization.Formatters.Binary.MessageFormatter:ReadMethodCall (System.IO.BinaryReader reader, Boolean hasHeaders, System.Runtime.Remoting.Messaging.HeaderHandler headerHandler, System.Runtime.Serialization.Formatters.Binary.BinaryFormatter formatter)
in <0x000ba> System.Runtime.Serialization.Formatters.Binary.BinaryFormatter:NoCheckDeserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler)
in <0x00010> System.Runtime.Serialization.Formatters.Binary.BinaryFormatter:Deserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler)
in <0x00248> System.Runtime.Remoting.Channels.BinaryServerFormatterSink:ProcessMessage (IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, System.IO.Stream requestStream, IMessage responseMsg, ITransportHeaders responseHeaders, System.IO.Stream responseStream)

Exception rethrown at [0]: 

in <0x006df> System.Runtime.Remoting.Proxies.RealProxy:PrivateInvoke (System.Runtime.Remoting.Proxies.RealProxy rp, IMessage msg, System.Exception exc, System.Object[] out_args)