Hello Friends,

I have post my question on NHibernate forums and also posting it here just incase someone working with hibernate can help. I came across this link from Ayende with explains the adding the manytoone property at run time to an persistent class. "http://ayende.com/Blog/archive/2008/05/01/Dynamic-Mapping-with-NHibernate.aspx"
I have a requirement in which I have to add a manytoone property to the children class and also add onetomany property to parent class.

I was able to add the manytoone as shown by Ayende but when following the similar approach for onetomany I am getting an error as "Operation is not valid due to the current state of the object".

I debugged the NHibernate source code and the exception is coming from the “CheckPropertyColumnDuplication” method of “NHibernate.Mapping.PersistentClass”. In this method there is a conditional OR check on IsUpdateable and IsInsertable properties of the new property we add to the class and these properties are throwing the exception.

Can anyone help me ?

Thanks