How to solve namespace or dll error

Question

How to solve this error

1) The type or namespace name 'ExceptionHandling' does not exist in the namespace 'System.Web.Http' (are you missing an assembly reference?) UnhandledExceptionLogger.cs 2 23

2) The type or namespace name 'WebApi' does not exist in the namespace 'SimpleInjector.Integration' (are you missing an assembly reference?) BlogEngineConfig.cs 15 34

i already add all dll but show that error how to resolve that errors.

please help

Francis · Answer

How you added those dlls? You should Right Click on the Project -> Select Add Reference in the floating menu. This is the proper way. Have you followed the same?