c# - 由于签名或安全透明性，Create Delegate 抛出绑定(bind)错误

Question

我正在使用 C#4.0 和 .NET 4.5。

我有这个类，它是当前上下文中的入口点:

public static class HttpConfigurationImporter
        {
            public static readonly string ConfigurationMethodName = "Register";
            public static readonly string ConfigClassName = "WebApiConfig";
            public static readonly string HelpPageConfigClassName = "HelpPageConfig";

            public static HttpConfiguration ImportConfiguration(string assemblyPath)
            {
                var assembly = Assembly.LoadFrom(assemblyPath);

                string originalDirectory = Environment.CurrentDirectory;
                Environment.CurrentDirectory = Path.GetDirectoryName(assemblyPath);

                Type webApiConfigType = assembly
                                  .GetTypes()
                                  .FirstOrDefault(t => t.Name == ConfigClassName);

                MethodInfo registerConfigMethod = webApiConfigType
                    .GetMethod(ConfigurationMethodName
                    , BindingFlags.Static | BindingFlags.Public);

                  //ERROR on this LINE
                  Action<HttpConfiguration> registerConfig = Delegate.
                    CreateDelegate(typeof(Action<HttpConfiguration>), 
                    registerConfigMethod)
                    as Action<HttpConfiguration>;

                HttpConfiguration config = new HttpConfiguration();
                registerConfig(config);
                ImportHelpPageConfiguration(assembly, config);
                Environment.CurrentDirectory = originalDirectory;
                return config;
            }
     }

当我尝试在另一个程序集中为以下目标创建委托(delegate)时......:

public static class WebApiConfig
    {
        public static void Register(HttpConfiguration configuration)
        {
            configuration.MapHttpAttributeRoutes();
        }
    }

我收到错误:无法绑定(bind)到目标方法，因为它的签名或安全透明度与委托(delegate)类型不兼容。

如何解决？

Answer 1

删除这部分:

//ERROR on this LINE
Action<HttpConfiguration> registerConfig = Delegate.
                    CreateDelegate(typeof(Action<HttpConfiguration>), 
                    registerConfigMethod)
                    as Action<HttpConfiguration>;

– 并尝试以这种方式调用 Register 方法

registerConfigMethod.Invoke(new object(), new object[] { config });

——代替

registerConfig(config);

它将像我的情况一样返回更准确的错误:

System.ArgumentException: 'Object of type 'System.Web.Http.HttpConfiguration' cannot be converted to type 'System.Web.Http.HttpConfiguration'.'

我有不同版本的 system.web.http.dll 用于构建程序集和执行此代码的程序集