1，控制器\ \ \ \ Repos \ \ \ \ \ Repos \ \ \ \ \ \ \ \ \ API。NullReferenceException:\ \ \ \ \ \ \ \ \。\\api\\\\repos\\！

2.对象引用设置到对象引用设置到对象引用设置到对象实例。\\api。NullReferenceException:行号696？

3.例子。\ \ API \ \ \ \控制器\ \ \ \ Repos \ \ \ API . cs:\ \ \ r \ \ Repos \ \ my controller。apicontroller。控制器\ \。\ \ \ \ \ \ \ \ API \ \ \ \ repos \ \ \ \ my controller . API controller . API controller .

4.API \ \ API \ \控制器。控制器\ \ \ API \ \ \ Repos \ \ \ API \ \ my controller . cs:\ \ \ API \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ my controller。nullreferenceexception:行号696系统。apicontroller。控制器。apicontroller。nullreferenceexception:未设置对象的实例。\\\\MyController。controllers . cs:\ \ my controller . d _ _ 3 moven ext(？

5.Apicontroller。API controller . d _ _ 3 moven ext()Location E:行号696系统。controllers . d _ _ 3 moven ext()Location E:行号696。