Is it possible to use implicit casts with types created at run-time in c#?

I'm creating a type at runtime using Reflection.Emit. The problem is that whenever I instantiate an instance of the new type I have to use object or dynamic because the type isn't known at compile time. This works fine except for when I would want another type to implicitly cast to the new type during assignment. The variable happily takes on the new value and it's corresponding type without attempting to cast to its current type.

Is there any way to create a variable of a newly created type that will allow for implicit casting? I'm perfectly happy to give up compile-time checking but I would like these casts to at least be attempted at run-time.