缺少编译器要求的成员“ystem.Runtime.CompilerServices.ExtensionAttribute.ctor”
缺少编译器要求的成员“ystem.Runtime.CompilerServices.ExtensionAttribute..ctor”
- //缺少编译器要求的成员“ystem.Runtime.CompilerServices.ExtensionAttribute..ctor”
- namespace System.Runtime.CompilerServices
- {
- public class ExtensionAttribute : Attribute { }
- }