为了找到您问题的答案，我创建了一个简单的插件系统，并在 Windows 下的 mono 3.2.3 上成功测试了它（不幸的是，我现在无法在 Linux 上进行测试，也许明天）。我的代码：
SDK.dll
using System;
namespace SDK
{
public interface IPlugin
{
void SomeMethod();
SomeSDKType GetSDKType();
}
}
using System;
using System.Collections.Generic;
namespace SDK
{
[Serializable]
public class StringEventArgs : EventArgs
{
public string Message { get; set; }
}
public class SomeSDKType : MarshalByRefObject
{
public event EventHandler<StringEventArgs> SDKEvent;
public Action SDKDelegate;
public void RiseSDKEvent(string message)
{
var handler = SDKEvent;
if (handler != null) SDKEvent(this, new StringEventArgs { Message = message });
}
public Dictionary<int, string> GetDictionary()
{
var dict = new Dictionary<int, string> ();
dict.Add(1, "One");
dict.Add(2, "Two");
return dict;
}
}
}
插件.dll
using System;
using SDK;
namespace Plugin
{
public class Plugin : MarshalByRefObject, IPlugin
{
public Plugin()
{
}
public void SomeMethod()
{
Console.WriteLine("SomeMethod");
}
public SomeSDKType GetSDKType()
{
var obj = new SomeSDKType();
obj.SDKDelegate = () => Console.WriteLine("Delegate called from {0}", AppDomain.CurrentDomain.FriendlyName);
return obj;
}
}
}
托管计划
using System;
using System.Reflection;
using System.IO;
using SDK;
namespace AppDomains
{
class MainClass
{
public static void Main(string[] args)
{
var domain = AppDomain.CreateDomain("Plugin domain"); // Domain for plugins
domain.Load(typeof(IPlugin).Assembly.FullName); // Load assembly containing plugin interface to domain
var currentPath = Directory.GetCurrentDirectory();
var pluginPath = Path.Combine(currentPath, "Plugins");
var pluginFiles = Directory.GetFiles(pluginPath, "*.dll");
foreach (var pluginFile in pluginFiles) // Foreach dll in Plugins directory
{
var asm = Assembly.LoadFrom(pluginFile);
foreach (var exportedType in asm.GetExportedTypes())
{
if (!typeof(IPlugin).IsAssignableFrom(exportedType)) continue; // Check if exportedType implement IPlugin interface
domain.Load(asm.FullName); // If so load this dll into domain
var plugin = (IPlugin)domain.CreateInstanceAndUnwrap(asm.FullName, exportedType.FullName); // Create plugin instance
plugin.SomeMethod(); // Call plugins methods
var obj = plugin.GetSDKType();
obj.SDKDelegate();
var dict = obj.GetDictionary();
foreach (var pair in dict)
{
Console.WriteLine("{0} - {1}", pair.Key, pair.Value);
}
obj.SDKEvent += obj_SDKEvent;
obj.RiseSDKEvent(string.Format("Argument from domain {0}", AppDomain.CurrentDomain.FriendlyName));
}
}
Console.ReadLine();
}
static void obj_SDKEvent(object sender, StringEventArgs e)
{
Console.WriteLine("Received event in {0}", AppDomain.CurrentDomain.FriendlyName);
Console.WriteLine(e.Message);
}
}
}
App.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<probing privatePath="Plugins"/>
</assemblyBinding>
</runtime>
</configuration>
对代码的一些解释。我用插件接口创建了 SDK dll。所有插件和宿主应用程序都必须引用它。必须在没有 SDK dll 的情况下提供插件，因为主机应用程序已经包含它。它们放入宿主应用程序目录中的 Plugins 目录（即，如果应用路径 = c:\MyApp 插件位于 c:\MyApp\Plugins em>) 以便为 CLR（或单声道）提供查找插件程序集的机会，我还创建了带有探测元素的 App.config 文件。
希望这会有所帮助。