How to create a Dynamic JNLP if JNLP is deployed on IIS ?

Question

I have to pass SessionID from my .NET WebApplication to the Java Swing Desktop App. I am invoking the Java Swing Desktop App using JNLP. The user is to authenticate in the .NET WebApp & then the session id is to be passed to the Java Desktop App. By Dynamically generating JNLP we can pass session id. Although can we do dynamic generation of JNLP using ASP.NET since my webapp is on IIS ? Incase we can than can someone plz post a code snippet or else suggest an alternative approach.