Loading/Unloading assembly in different AppDomain

Question

I need to execute a method in an assembly loaded during runtime. Now I want to unload those loaded assemblies after the method call. I know that I need a new AppDomain so I

Answer 1

Take a look into this previous answer: How to load an assembly into different AppDomain on Windows Mobile (.NET CF) ?. That answer creates a proxy class which runs into new AppDomain context so, there, you can have full control of your initialization.

You could to create a Start() method into ServiceApplicationProxy class and just call it normally from your hoster with a proxy.Start().

Answer 2

Try this:

namespace SeperateAppDomainTest
{
    class Program
    {
        static void Main(string[] args)
        {
            LoadAssembly();
        }

        public static void LoadAssembly()
        {
            string pathToDll = Assembly.GetExecutingAssembly().CodeBase;
            AppDomainSetup domainSetup = new AppDomainSetup { PrivateBinPath = pathToDll };
            var newDomain = AppDomain.CreateDomain("FooBar", null, domainSetup);
            ProxyClass c = (ProxyClass)(newDomain.CreateInstanceFromAndUnwrap(pathToDll, typeof(ProxyClass).FullName));
            Console.WriteLine(c == null);

            Console.ReadKey(true);
        }
    }

    public class ProxyClass : MarshalByRefObject { }

Answer 3

https://msdn.microsoft.com/en-us/library/3c4f1xde%28v=vs.110%29.aspx

specifies that

typeName Type: System.String

The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the Type.FullName

property.

So try calling with Fully qualified name, instead of using typeof(InstanceProxy).ToString() use string/text "<<Namespace>>.InstanceProxy"

as below

InstanceProxy proxy = domain.CreateInstanceAndUnwrap(path, "<<Namespace>>.InstanceProxy") as InstanceProxy;