InvalidCastException of a Activator.CreateInstance object during an installation procedure

Question

I have the following procedure

private static IMyInterface OpenInstance( 
string assemblyPath, 
string classType, 
string assemblyName, 
out AppDomain domainInst         


        

Answer 1

I solved the problem following the link proposed at this post

stack overflow: appdomain-createinstancefromandunwrap-unable-to-cast-transparent-proxy

The link that gives us the solution code is

west-wind.com: Assembly Loading across appdomain

It is really a basic thing, i was falled in the case where an assembly is loaded by an external application (in my specific case: the wow64 installer application).

The application does not know where to find the assemblies that depend from the main assembly you are loading, so you have to write a custom assembly resolver for the current application domain (in my specific case: the wow64 installer application) in order to give the necessary loading information inside it.

Head to the west-winf link to get the code, it works perfectly