nhibernate for ASP.NET - Could not add assembly ORM_dscnew - nhibernate

Question

I am new to nhibernate. I am facing the following problem:
Exception thrown: 'NHibernate.MappingException' in NHibernate.dll
NHibernate.MappingException: Could not add assembly ORM_dscnew ---> System.IO.FileNotFoundException: Could not load file or assembly 'ORM_dscnew' or one of its dependencies. The system cannot find the file specified.
at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection)
at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
at System.Reflection.Assembly.Load(String assemblyString)
at NHibernate.Cfg.Configuration.AddAssembly(String assemblyName)
--- End of inner exception stack trace ---
at NHibernate.Cfg.Configuration.LogAndThrow(Exception exception)
at NHibernate.Cfg.Configuration.AddAssembly(String assemblyName)
at viroffice.ORM_sessionf.Init() in D:\GDrive\Projects\VirOffice\viroffice\DataObjects\ORM_sessionf.vb:line 7
While executing the function:
Private Shared sFactory As NHibernate.ISessionFactory
Private Shared Sub Init()
Dim config As New NHibernate.Cfg.Configuration()
Try
config.AddAssembly("ORM_dscnew")
sFactory = config.BuildSessionFactory()
Catch ex As Exception
System.Diagnostics.Debug.WriteLine(ex)
Exit Sub
End Try
End Sub
While executing the above function, I am getting the error.
ORM_dscnew.hbm.xml:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns = "urn:nhibernate-mapping-2.2" namespace = "viroffice.DataObjects" assembly = "viroffice">
<class name = "ORM_dscnew" table="dsc_new">
<id name = "new_id">
<generator class = "native"/>
</id>
<property name = "vnm" />
<property name = "vcn_name" />
<property name = "vref" />
<property name = "vcn_per" />
<property name = "vcn_no" />
<property name = "vcn_email" />
<property name = "vcn_email1" />
<property name = "vrmks" />
<property name = "vstatus" />
<property name = "vapp_id" />
<property name = "vmob_ver" />
<property name = "vchg_code" />
</class>
</hibernate-mapping>
Kindly advice what needs to be done?

Answer 1

Using AddAssembly("ORM_dscnew") result in a call to System.Reflection.Assembly.Load("ORM_dscnew"). And in your case, the .Net Framework is unable to find your assembly and yields a FileNotFoundException.
NHibernate just wrap it in a MappingException. The root trouble is your assembly being not found (or one of its dependencies...). Microsoft docs states the assembly name should be a long name, and your code only supply the simple name, so maybe that is your issue.
Anyway, personally, I favor adding an assembly by getting it from a type contained in it. Of course, this implies your factory will need a reference to such a type.
config.AddAssembly(typeof(ATypeInORM_dscnew).Assembly);