I need help Please
I follow exactly the example that this web site have given,but after i run the program there have an error as "Unknow entity class:NHibernate.Examples.QuickStart.User", when it come to session.save(newUser).
is it because the AddAssembly?because when i use the session.AddAssembly("NHibernate.Examples") there have an error as "Could not load file or assembly 'NHibernate.Examples' or one of its dependencies. The system cannot find the file specified". later i change it to session.AddAssembly("NHibernate") there was correct but when come to session.save i will have error as "Unknow entity class:NHibernate.Examples.QuickStart.User".

thanks a lot if anyone can help me on this

Do you have your mapping files (.xml) in classpath or listed in hibernate.cfg.xml? See documentation.

i only have the hibernate.cfg.xml at NHibernate file folder i download from, i didn't have it at my own project. do i need to copy it into my own project?
sorry can i ask where is the classpath u mean?
thanks...

Which assembly is NHibernate.Examples.QuickStart.User defined in?

my assembly is User.hbm.xml as below:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">
<class name="User" table="users">
<id name="LogonID" column="LogonID" type="String" length="20" unsaved-value="0">
<generator class="assigned" />
</id>
<property name="Name" column="Name" type="String" length="40"/>
<property name="Password" column="Password" type="String" length="20"/>
<property name="EmailAddress" column="EmailAddress" type="String" length="40"/>
<property name="LastLogon" column="LastLogon" type="DateTime"/>
</class>
</hibernate-mapping>

It's not your assembly, it's a mapping file. Besides, the class name is not qualified there, so NHibernate will not know where it should look for class="User".

sorry my mapping file is as below:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">
<class name="NHibernate.Examples.Quickstart, NHibernate.Examples" table="users">
<id name="LogonID" column="LogonID" type="String" length="20" unsaved-value="0">
<generator class="assigned" />
</id>
<property name="Name" column="Name" type="String" length="40"/>
<property name="Password" column="Password" type="String" length="20"/>
<property name="EmailAddress" column="EmailAddress" type="String" length="40"/>
<property name="LastLogon" column="LastLogon" type="DateTime"/>
</class>
</hibernate-mapping>

if i use the example from this web site, what is the exactly Assembly is?
thanks...

The assembly is essentially the name of the file that your project compiles to. If it's NHibernate.Examples.dll then the assembly is NHibernate.Examples. Ensure that .NET can find the assembly and that it contains the User class.

You should first learn .NET basics, then you will have much less problems using NHibernate.

i'm using "visual web developer 2005 Express Edition" to view the result of save successfully or fail. while i use "Microsoft visual basic 2005 Express Edition" to create the NHibernate.Examples.dll after that i add references of this dll into "visual web developer 2005 Express Edition" file that i have created, from there it will not have the user.vb,user.hbm.xml because it already create at the dll, izit correct if i doing this?
thanks a lot.....

Thanks a lot, i have solve the problem :)