Is there a way to force derived classes to implement serializable?

Ooops sorry I didnt grasp what exactly functionality you are ranning after.
I do not have any idea how to force Serialization but you can force disposing followinf the pattern:
[code]
public class A : IDisposable
{
public A()
{}
virtual public void Dispose()
{
Exception ex = new Exception("No Dispose implemented, blah blah ...");
throw ex;
}
}
public class B : A
{
public B()
{}
public void Dispose()
{
}
}
[/code]