钻石组件对MEF的依赖性

Question

我有四个程序集，它们相互参照，如上图所示：

TpProjectModel共享接口，DILib和FileProject实现它们，而TpPtojektCLI根据配置文件中的设置使用其中一种实现方式

当我想在TpProjectCLI中编写它们时，我有以下例外情况：

  

组成保持不变。更改被拒绝，因为   出现以下错误：组合物产生了一个   组成错误。根本原因在下面提供。查看   CompositionException.Errors属性以获取更多详细信息。

     

1）找到多个与约束匹配的出口：     合同名称TpProjectModel.Reflection.IReflector     RequiredTypeIdentity TpProjectModel.Reflection.IReflector

     

结果：无法设置导入   'ViewModels.Dashboard.DashboardViewModel.Reflector   （ContractName =“ TpProjectModel.Reflection.IReflector”）'部分   'ViewModels.Dashboard.DashboardViewModel'。元件：   ViewModels.Dashboard.DashboardViewModel.Reflector   （ContractName =“ TpProjectModel.Reflection.IReflector”）->   ViewModels.Dashboard.DashboardViewModel

以及如何获取所有所需程序集的代码：

NameValueCollection plugins = (NameValueCollection)ConfigurationManager.GetSection("plugins");
string[] pluginsCatalogs = plugins.AllKeys;
List<DirectoryCatalog> assemblyCatalogs = new List<DirectoryCatalog>();

foreach (string pluginsCatalog in pluginsCatalogs)
{
    if (Directory.Exists(pluginsCatalog))
        assemblyCatalogs.Add(new DirectoryCatalog(pluginsCatalog));
}

AggregateCatalog catalog = new AggregateCatalog(assemblyCatalogs);
CompositionContainer container = new CompositionContainer(catalog);

try
{
    container.ComposeParts(this);
}
catch (CompositionException compositionException)
{
    Console.WriteLine(compositionException.ToString());
    throw;
}
catch (Exception exception) when (exception is ReflectionTypeLoadException)
{
    ReflectionTypeLoadException typeLoadException = (ReflectionTypeLoadException)exception;
    Exception[] loaderExceptions = typeLoadException.LoaderExceptions;
    loaderExceptions.ToList().ForEach(ex => Console.WriteLine(ex.StackTrace));

    throw;
}