AssemblyLoad

My question is similar to others, but my particular nuance of this problem doesn't appear to have an answer I can find on here so far, so here goes. (edits in italics)

Our company has a deployed application written in VB6. Since VB6 development is no longer officially supported in Windows, our company made the decision to port our VB6 application to VB.NET.

(Prior to this edit, I had mentioned that the project was converted to VB.NET using VS 2015. This was incorrect, I discovered that my coworker had actually performed the conversion using VS 2008, and I was working on the 2008 project in 2015.)

So we are now working with the VB.NET conversion in VS2015. As many of us know, the VS 2008 converter does an incomplete job porting VB6 code to VB.NET code so there are many, many errors to sort through (as of this writing, all compile errors are fixed). In particular, though, I'm trying to open the various forms for the project in the Designer so I can see and work with them. The designer specifically is reporting the error:

Goal

I have a couple of interfaces and some dlls that provide implementations for these interfaces. I want to load the implementation into a new AppDomain (so I can unload the dll later) and instatiate the implementation in the new AppDomain and then use a clientside(here the default AppDomain) proxy to wrap the actual implementation object. The goal is to create these ClientProxy instances once and change their actual implementations whenever while not loading the implementations assembly into the default AppDomain.

Problem

When calling a method on the ClientProxy __TransparentProxy object that gets another ClientProxy as argument I get the following Exceptions:

System.Runtime.Remoting.RemotingException: 'The argument type 'System.MarshalByRefObject' cannot be converted into parameter type 'IData'.'

With inner Exception:

InvalidCastException: Object must implement IConvertible.

When passing the __TransparentProxy obtained directly from the Server AppDomain the ClientProxy works.

Setup

Cloneable from: https://github.com/mailgerigk/remoting

Interfaces:

I'm using the following code to load an assembly at runtime and then get a reference to a specific method and obviously execute it at the end:

I try to create new application domain and load new assembly:

I am implementing a plugin architecture for a .net core MVC application. A requirement of each of my plugins is to implement an interface from a centralised core library in which the main mvc application will then call the implemented interface method in each of the plugin modules.

Now I get my list of assemblies and from my .NET Core Startup file call the LoadModuleAssemblies method:

I have the following property:

I'm building a web application, where I would like separate concerns, i.e. having abstractions and implementations in different projects.

To achieve this, I've tried to implement a composition root concept, where all implementation must have an instance of ICompositionRootComposer to register services, types etc.

I'm having trouble running resharper tests for my solution when targeting Any CPU. The error I'm getting is

ERROR System.IO.FileNotFoundException: Could not load file or assembly 'file:///D:_dist\path\to\my\bin\folder\JetBrains.ReSharper.UnitTestRunner.nUnit30.dll' or one of its dependencies. The system cannot find the file specified. at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadFrom(String assemblyFile, Evidence securityEvidence, Byte[] hashValue, AssemblyHashAlgorithm hashAlgorithm, Boolean forIntrospection, Boolean suppressSecurityChecks, StackCrawlMark& stackMark) at System.Reflection.Assembly.LoadFrom(String assemblyFile) at JetBrains.ReSharper.UnitTestRunner.nUnit.NUnitTaskRunner.SetupRunnerAssembly(NUnitVersion nUnitVersion) at JetBrains.ReSharper.UnitTestRunner.nUnit.NUnitTaskRunner.SetUpNUnitRunner(NUnitVersion version, String nUnitInstallDir) at JetBrains.ReSharper.UnitTestRunner.nUnit.NUnitTaskRunner.RunTestsInAssemblies(List1 assemblies, NUnitTestAssemblySetTask assemblySetTask, Boolean useAddins, NUnitVersion nUnitVersion) at JetBrains.ReSharper.UnitTestRunner.nUnit.NUnitTaskRunner.ExecuteRecursive(TaskExecutionNode node) at JetBrains.ReSharper.TaskRunnerFramework.StartupTaskRunnerHost.Execute(TaskExecutionNode node) at JetBrains.ReSharper.TaskRunnerFramework.StartupTaskRunnerHost.ExecuteNodes(IEnumerable1 nodes) at JetBrains.ReSharper.TaskRunnerFramework.TasksPacketHandler.ThreadProc(TaskRunnerProxy proxy, IEnumerable`1 packets, AssemblyLoader loader)

When I turn the solution into x86, the tests run (but because these tests run fine for others with Resharper, I can't just go and create an x86 configuration in the solution).

Does anyone know what the issue is? I'm running VS2015, Resharper 2016.3.2, and the solution is a c#/asp.net mvc solution, with a Service Fabric microservice (the other reason I'd rather not resort to having to switch to x86 to run tests).

Any help is greatly appreciated.

So I have this DLL and this other thing which I think is refered to as a Injector / loader? It basically loads my DLL into the process of itself so it takes my DLL and loads it into the process of "Injector.exe" In the example down below it doesnt load it from resources but instead from the desktop, the same thing applies here.

Now sicne it's being loaded it doesnt really call any functions and this is where my problem comes in.

I would like to call some the Messagebox function when the DLL is being loaded.

As far as I know and the most logical way would be to do this in the btnAssemblyLoad_Click event so when the event happens it calls the functions in the DLL. The issue is I have no idea what this would be called, I read something about "Reflection" but im not sure this is what I would need.

How should I go on about this?