从C＃中的文件将DLL程序集加载到自定义AppDomain

Question

I tryed next code:

AppDomain ad = AppDomain.CreateDomain("Test");      
_Assembly = parDomain.Load(AssemblyName.GetAssemblyName(@"C:\SomeDLLPath\PhysicsTest.dll"));
// Some work with assembly
AppDomain.Unload(ad);

It raise FileNotFoundException that cannot load file or assembly "TestClass, Version=1.0.0.0, ..."

If I Load Assembly to this domain all OK:

_Assembly = Assembly.LoadFile(@"C:\SomeDLLPath\PhysicsTest.dll");

But i need to unload this too.

I saw many threads about it but can't understand them...

Answer 1

From MSDN

Blockquote

There is no way to unload an individual assembly without unloading all of the application domains that contain it. Even if the assembly goes out of scope, the actual assembly file will remain loaded until all application domains that contain it are unloaded.

Here is how to unload a AppDomain MSDN

using System;
using System.Reflection;

class AppDomain2
{
    public static void Main()
    {
        Console.WriteLine("Creating new AppDomain.");
        AppDomain domain = AppDomain.CreateDomain("MyDomain", null);

        Console.WriteLine("Host domain: " + AppDomain.CurrentDomain.FriendlyName);
        Console.WriteLine("child domain: " + domain.FriendlyName);
        AppDomain.Unload(domain);
        try
        {
            Console.WriteLine();
            Console.WriteLine("Host domain: " + AppDomain.CurrentDomain.FriendlyName);
            // The following statement creates an exception because the domain no longer exists.
            Console.WriteLine("child domain: " + domain.FriendlyName);
        }
        catch (AppDomainUnloadedException e)
        {
            Console.WriteLine(e.GetType().FullName);
            Console.WriteLine("The appdomain MyDomain does not exist.");
        }
    }
}