抛出AppDomain异常

Question

I've found a lot of similar questions but couldn't find any solution.

I have following code:

    string file = "c:\\abc.dll";
    AppDomainSetup ads = new AppDomainSetup();
    ads.PrivateBinPath = Path.GetDirectoryName(file);
    AppDomain ad2 = AppDomain.CreateDomain("AD2", null, ads);
    ProxyDomain proxy = (ProxyDomain)ad2.CreateInstanceAndUnwrap(typeof(ProxyDomain).Assembly.FullName, typeof(ProxyDomain).FullName); 

Assembly asm = proxy.GetAssembly(file); // exception File.IO assembly not found is thrown here after succesfully running the funktion GetAssembly.


  public class ProxyDomain : MarshalByRefObject
  {
     public Assembly GetAssembly(string assemblyPath)
     {
        try
        {
           Assembly asm = Assembly.LoadFile(assemblyPath);
           //...asm is initialized correctly, I can see everything with debugger
           return asm;
        }
        catch
        {
           return null;
        }
     }
  }

The most Interesting thing that then my GetAssembly funktion returns some other type, even my custom serializable class, everything is fine. Does someone know what I'm missing? Or It's just impossible to return loaded assembly to another domain?

Thank you

Answer 1

I imagine File.IO is sitting in your main application's bin directory? If so, your abc.dll will not know where to find it (unless your main application is also sitting in C:\\\\ ).

You need to do one of

1. Bind to the AppDomain.AssemblyResolve event and manually load the referenced dll
2. Change the AppDomainSetup 's base directory (which is one of the places .NET knows to look for dlls)
3. Install File.IO to the GAC (which is another one of the places .NET knows to look for dlls)
4. Add the location of File.IO to your AppDomainSetup's private probing path (which is another one of the places .NET will try to look for dlls).