Load dll into another domain exception

问题:

Hi I am loading dll into another domain, it works fine when loaded into that domain but when i want some information from that domain through proxy object it gives me exception below is the code for review is there any wrong step ???

 public class AssemblyProxy
    {
        System.Type[] _types;

    public System.Type[] GetTypes() 
    {
        return _types;
    }

    public string FullName { get; set; }

    public void LoadAssembly(string path)
    {
        try
        {
            Evidence evidence = new Evidence(AppDomain.CurrentDomain.Evidence);

            AppDomain TestDomain = AppDomain.CreateDomain("AssemblyDomain", evidence, AppDomain.CurrentDomain.BaseDirectory, System.IO.Path.GetFullPath(path), true);

            Proxy _asmProxy = (Proxy)TestDomain.CreateInstanceFromAndUnwrap(AppDomain.CurrentDomain.BaseDirectory+"Common.dll", typeof(Proxy).FullName);

            _asmProxy.LoadAssembly(path);

            FullName = _asmProxy.FullName;
            _types = _asmProxy.GetTypes(); //Here i got Exception [Can not load file or assembly]

            AppDomain.Unload(TestDomain);
        }
        catch (Exception ex) 
        {

        }

    }

}

class Proxy : MarshalByRefObject
{
    System.Type[] _types;

    public string FullName { get; set; }

    public System.Type[] GetTypes() 
    {
        return _types;                    
    }

    public void LoadAssembly(string path) 
    {
        System.Reflection.Assembly _assembly = System.Reflection.Assembly.Load(System.IO.File.ReadAllBytes(path));
        _types = _assembly.GetTypes();
        FullName = _assembly.FullName;
    }
}

The exception I get is:

Can not load file or assembly

回答1:

The way I solved this problem was by calling LoadFrom (not Load) and in the context of the AppDomain:

sDomain = AppDomain.CreateDomain(DOMAIN_NAME);
sDomain.DoCallBack(AppDomainCallback);

// runs in the context of the AppDomain
private void AppDomainCallback()
{
  Assembly assembly = Assembly.LoadFrom(mAssemblyName);
}

回答2:

I Have solved the issue by reading following Blog Post: the problem in my case is that i am returning System.Type Object from new domain which is no allowed you can return strings from proxy object but not System.Type object

Link