ProtoBuf_編譯生成DLL錯誤
Unity中匯入DLl後的錯誤日誌：
Unhandled Exception: System.Reflection.ReflectionTypeLoadException: The classes in the module cannot be loaded.
at (wrapper managed-to-native) System.Reflection.Assembly:GetTypes (bool)
at System.Reflection.Assembly.GetTypes () [0x00000] in <filename unknown>:0
at Mono.CSharp.RootNamespace.ComputeNamespaces (System.Reflection.Assembly assembly, System.Type extensionType) [0x00000] in <filename unknown>:0
at Mono.CSharp.RootNamespace.ComputeNamespace (Mono.CSharp.CompilerContext ctx, System.Type extensionType) [0x00000] in <filename unknown>:0
at Mono.CSharp.GlobalRootNamespace.ComputeNamespaces (Mono.CSharp.CompilerContext ctx) [0x00000] in <filename unknown>:0
at Mono.CSharp.Driver.LoadReferences () [0x00000] in <filename unknown>:0
at Mono.CSharp.Driver.Compile () [0x00000] in <filename unknown>:0
at Mono.CSharp.Driver.Main (System.String[] args) [0x00000] in <filename unknown>:0
Missing method .ctor in assembly D:\TankPrj\Prj\TankWar1\Assets\Plugins\proto\ProtoSerializer.dll, type System.Runtime.Versioning.TargetFrameworkAttribute
The class System.Runtime.Versioning.TargetFrameworkAttribute could not be loaded, used in ProtoSerializer
Can't find custom attr constructor image: D:\TankPrj\Prj\TankWar1\Assets\Plugins\proto\ProtoSerializer.dll mtoken: 0x0a00041e
Missing method .ctor in assembly D:\TankPrj\Prj\TankWar1\Assets\Plugins\proto\TankModel.dll, type System.Runtime.Versioning.TargetFrameworkAttribute
Can't find custom attr constructor image: D:\TankPrj\Prj\TankWar1\Assets\Plugins\proto\TankModel.dll mtoken: 0x0a000002
解決方法： 開啟mono，右鍵options->General（Build）->Target framework: Mono /.NET 2.0‘
產生原因：unity升級後，mono升級，生成proto協議環境變化