加载 DLL 期间的 C# 异常。找不到解决办法

Question

我有一个问题，DLL在运行时加载C#.

以下代码：

foreach (var f in Directory.EnumerateFiles(startFolder, "*.dll",            SearchOption.AllDirectories))
{
   try
   {
       var assembly = Assembly.LoadFrom(f);
       var types = assembly.GetTypes(); //exception raised here

       foreach (var type in types)
       {
            if (type.GetInterface("IPlayerFactory") != null)
                 instances.Add((IPlayerFactory)Activator.CreateInstance(type));
       }
       assembly = null;
    }
    catch (ReflectionTypeLoadException ex) { /* later, keep reading  */}

所以例外说：

An exception of type 'System.Reflection.ReflectionTypeLoadException' occurred in
mscorlib.dll but was not handled in user code

Additional information: Unable to load one or more of the requested types. Retrieve the    
LoaderExceptions property for more information.

我稍微搜索了堆栈，发现这个是catch为了寻找更多信息（来源：这里）

捕获块：

catch (ReflectionTypeLoadException ex)
{
     StringBuilder sb = new StringBuilder();
     foreach (Exception exSub in ex.LoaderExceptions)
     {
          sb.AppendLine(exSub.Message);
          FileNotFoundException exFileNotFound = exSub as FileNotFoundException;
          if (exFileNotFound != null)
          {
              if (!string.IsNullOrEmpty(exFileNotFound.FusionLog))
              {
                  sb.AppendLine("Fusion Log:");
                  sb.AppendLine(exFileNotFound.FusionLog);
              }
          }
                    sb.AppendLine();
      }
      string errorMessage = sb.ToString();
      //Display or log the error based on your application.
      Console.WriteLine(sb);
 }

所以我设法提取：

'Battleships.Desktop.vshost.exe' (CLR v4.0.30319: Battleships.Desktop.vshost.exe):
 Loaded 'C:\SomePath\some_dll.dll'. Cannot find
 or open the PDB file.
 A first chance exception of type 'System.Reflection.ReflectionTypeLoadException'  
 occurred in mscorlib.dll

我尝试了一些解决方案，但没有任何效果。有什么新鲜的想法吗？

Answer 1

在调试模式下构建代码时，会创建两个文件，一个是类库，另一个是“调试数据库”.pdb 文件。如果您在调试模式下运行代码，请将 pdb 文件也包含在反射代码的 bin 中. 另一件事是在命令提示符下使用 fuslogvw 查看 Fusion 日志。它可能会提供任何未处理的运行时故障/依赖项。