Unhandled Exception: NHibernate.LazyInitializationException: Failed to lazily in
itialize a collection ---> NHibernate.Type.SerializationException: Could not des
erialize a serializable property:  ---> System.Runtime.Serialization.Serializati
onException: Unable to find assembly 'NHibernate, Version=1.0.2.0, Culture=neutr
al, PublicKeyToken=154fdcb44c4484fc'.
   at System.Runtime.Serialization.Formatters.Binary.BinaryAssemblyInfo.GetAssem
bly()
   at System.Runtime.Serialization.Formatters.Binary.ObjectReader.GetType(Binary
AssemblyInfo assemblyInfo, String name)
   at System.Runtime.Serialization.Formatters.Binary.ObjectMap..ctor(String obje
ctName, String[] memberNames, BinaryTypeEnum[] binaryTypeEnumA, Object[] typeInf
ormationA, Int32[] memberAssemIds, ObjectReader objectReader, Int32 objectId, Bi
naryAssemblyInfo assemblyInfo, SizedArray assemIdToAssemblyTable)
   at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.ReadObjectWi
thMapTyped(BinaryObjectWithMapTyped record)
   at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.ReadObjectWi
thMapTyped(BinaryHeaderEnum binaryHeaderEnum)
   at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run()
   at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(He
aderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAp
pDomain, IMethodCallMessage methodCallMessage)
   at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize
(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCr
ossAppDomain, IMethodCallMessage methodCallMessage)
   at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize
(Stream serializationStream)
   at NHibernate.Type.SerializableType.FromBytes(Byte[] bytes) in C:\nhibernate\
trunk\nhibernate\src\NHibernate\Type\SerializableType.cs:line 144
   --- End of inner exception stack trace ---
   at NHibernate.Type.SerializableType.FromBytes(Byte[] bytes) in C:\nhibernate\
trunk\nhibernate\src\NHibernate\Type\SerializableType.cs:line 148
   at NHibernate.Type.SerializableType.Get(IDataReader rs, Int32 index) in C:\nh
ibernate\trunk\nhibernate\src\NHibernate\Type\SerializableType.cs:line 66
   at NHibernate.Type.NullableType.NullSafeGet(IDataReader rs, String name) in C
:\nhibernate\trunk\nhibernate\src\NHibernate\Type\NullableType.cs:line 264
   at NHibernate.Type.NullableType.NullSafeGet(IDataReader rs, String[] names, I
SessionImplementor session, Object owner) in C:\nhibernate\trunk\nhibernate\src\
NHibernate\Type\NullableType.cs:line 206
   at NHibernate.Type.AbstractType.Hydrate(IDataReader rs, String[] names, ISess
ionImplementor session, Object owner) in C:\nhibernate\trunk\nhibernate\src\NHib
ernate\Type\AbstractType.cs:line 127
   at NHibernate.Loader.Loader.Hydrate(IDataReader rs, Object id, Object obj, IL
oadable persister, ISessionImplementor session, String[][] suffixedPropertyColum
ns) in C:\nhibernate\trunk\nhibernate\src\NHibernate\Loader\Loader.cs:line 1028
   at NHibernate.Loader.Loader.LoadFromResultSet(IDataReader rs, Int32 i, Object
obj, Type instanceClass, EntityKey key, LockMode lockMode, ILoadable rootPersis
ter, ISessionImplementor session) in C:\nhibernate\trunk\nhibernate\src\NHiberna
te\Loader\Loader.cs:line 927
   at NHibernate.Loader.Loader.InstanceNotYetLoaded(IDataReader dr, Int32 i, ILo
adable persister, EntityKey key, LockMode lockMode, EntityKey optionalObjectKey,
Object optionalObject, IList hydratedObjects, ISessionImplementor session) in C
:\nhibernate\trunk\nhibernate\src\NHibernate\Loader\Loader.cs:line 884
   at NHibernate.Loader.Loader.GetRow(IDataReader rs, ILoadable[] persisters, En
tityKey[] keys, Object optionalObject, EntityKey optionalObjectKey, LockMode[] l
ockModes, IList hydratedObjects, ISessionImplementor session) in C:\nhibernate\t
runk\nhibernate\src\NHibernate\Loader\Loader.cs:line 818
   at NHibernate.Loader.Loader.GetRowFromResultSet(IDataReader resultSet, ISessi
onImplementor session, QueryParameters queryParameters, LockMode[] lockModeArray
, EntityKey optionalObjectKey, IList hydratedObjects, EntityKey[] keys, Boolean
returnProxies) in C:\nhibernate\trunk\nhibernate\src\NHibernate\Loader\Loader.cs
:line 294
   at NHibernate.Loader.Loader.DoQuery(ISessionImplementor session, QueryParamet
ers queryParameters, Boolean returnProxies) in C:\nhibernate\trunk\nhibernate\sr
c\NHibernate\Loader\Loader.cs:line 425
   at NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionIm
plementor session, QueryParameters queryParameters, Boolean returnProxies) in C:
\nhibernate\trunk\nhibernate\src\NHibernate\Loader\Loader.cs:line 182
   at NHibernate.Loader.Loader.LoadCollection(ISessionImplementor session, Objec
t id, IType type) in C:\nhibernate\trunk\nhibernate\src\NHibernate\Loader\Loader
.cs:line 1505
   at NHibernate.Loader.Collection.CollectionLoader.Initialize(Object id, ISessi
onImplementor session) in C:\nhibernate\trunk\nhibernate\src\NHibernate\Loader\C
ollection\CollectionLoader.cs:line 36
   at NHibernate.Persister.Collection.AbstractCollectionPersister.Initialize(Obj
ect key, ISessionImplementor session) in C:\nhibernate\trunk\nhibernate\src\NHib
ernate\Persister\Collection\AbstractCollectionPersister.cs:line 305
   at NHibernate.Impl.SessionImpl.InitializeCollection(IPersistentCollection col
lection, Boolean writing) in C:\nhibernate\trunk\nhibernate\src\NHibernate\Impl\
SessionImpl.cs:line 4312
   at NHibernate.Collection.AbstractPersistentCollection.Initialize(Boolean writ
ing) in C:\nhibernate\trunk\nhibernate\src\NHibernate\Collection\AbstractPersist
entCollection.cs:line 238
   --- End of inner exception stack trace ---
   at NHibernate.Collection.AbstractPersistentCollection.Initialize(Boolean writ
ing) in C:\nhibernate\trunk\nhibernate\src\NHibernate\Collection\AbstractPersist
entCollection.cs:line 243
   at NHibernate.Collection.AbstractPersistentCollection.Read() in C:\nhibernate
\trunk\nhibernate\src\NHibernate\Collection\AbstractPersistentCollection.cs:line
49
   at NHibernate.Collection.PersistentBag.get_Count() in C:\nhibernate\trunk\nhi
bernate\src\NHibernate\Collection\PersistentBag.cs:line 339
   at Forms.Persistence.Entity.Submission.ToString() in C:\Documents and Setting
s\jemiller\My Documents\Visual Studio 2005\Projects\Forms\FormsLibrary\Forms.Per
sistence.Entity\Submission.cs:line 58
   at System.IO.TextWriter.WriteLine(Object value)
   at System.IO.TextWriter.SyncTextWriter.WriteLine(Object value)
   at System.Console.WriteLine(Object value)
   at FormsConsoleApplication.Program.Main(String[] args) in C:\Documents and Se
ttings\jemiller\My Documents\Visual Studio 2005\Projects\Forms\FormsConsoleAppli
cation\Program.cs:line 42

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0" assembly="FormsLibrary"
    namespace="Forms.Persistence.Entity">
  <class name="File" table="`File`" lazy="false">
    <id name="Id">
      <generator class="identity"/>
    </id>
    <property name="Content" type="BinaryBlob" length="10485760"/>
    <property name="ContentType"/>
    <property name="Name"/>
  </class>
</hibernate-mapping>

using System;
using System.Diagnostics;
using System.Text;

namespace Forms.Persistence.Entity
{
    [Serializable]
    public class File
    {
        private byte[] content;
        private string contentType;
        private int id;
        private string name;
        private static TraceSource traceSource = new TraceSource("Forms",
            SourceLevels.All);

        public File()
        {
        }

        public File(string name, string contentType, byte[] content)
        {
            this.name = name;
            this.contentType = contentType;
            this.content = content;
        }

        public virtual byte[] Content
        {
            get { return content; }
            set { content = value; }
        }

        public virtual string ContentType
        {
            get { return contentType; }
            set { contentType = value; }
        }

        public virtual int Id
        {
            get { return id; }
            set { id = value; }
        }

        public virtual string Name
        {
            get { return name; }
            set { name = value; }
        }

        public override string ToString()
        {
            StringBuilder sb = new StringBuilder("{");
            sb.AppendFormat("Id = {0}", Id);
            sb.AppendFormat(", Content = {0}", Content);
            sb.AppendFormat(", ContentType = {0}", ContentType);
            sb.AppendFormat(", Name = {0}", Name);
            sb.Append("}");
            return sb.ToString();
        }
    }
}