C# 为什么枚举MEF部件会导致容器初始化失败?
以下代码引发InvalidOperationException,消息:全局容器已初始化C# 为什么枚举MEF部件会导致容器初始化失败?,c#,mef,composition,C#,Mef,Composition,以下代码引发InvalidOperationException,消息:全局容器已初始化 var aggcat = new AggregateCatalog(); aggcat.Catalogs.Add(new AssemblyCatalog(Assembly.GetExecutingAssembly().Location)); // This line does something to the catalog aggcat.Pa
var aggcat = new AggregateCatalog();
aggcat.Catalogs.Add(new AssemblyCatalog(Assembly.GetExecutingAssembly().Location));
// This line does something to the catalog
aggcat.Parts.ToArray();
_container = new CompositionContainer(aggcat, true);
// Exception gets thrown here
System.ComponentModel.Composition.Hosting.CompositionHost.Initialize(_container);
当我注释掉零件时,它工作得很好。这里发生了什么?我从来没有弄清楚它的细节,但是程序集目录进行了大量的延迟加载。调用ToArray将强制它完成延迟处理