HttpResponse does not contain a definition for AddHeader for Dot Net Core
问题 When moving a project into .Net Core, AddHeader throws an error: Error CS1061 'HttpResponse' does not contain a definition for 'AddHeader' and no extension method 'AddHeader' accepting a first argument of type 'HttpResponse' could be found (are you missing a using directive or an assembly reference?) .NETCoreApp,Version=v1.0 回答1: Checkout Examples: string combineValue = httpContext.Request.Headers["header1]; if (string.IsNullOrEmpty(combineValue)) // ... var values = httpContext.Request