'AllowAnonymous' could not be found

Question

Everything worked fine until I installed (Package Manager Console) the postal package, then uninstalled and installed an older version.

Now I get an error where it previously was not. Error:

The type or namespace name 'AllowAnonymous' could not be found (are you missing a using directive or an assembly reference?)

Who knows how to fix this?

Answer 1

Probably you are missing the reference to System.Web.Http assembly in your project?

So you need to:

• Add the reference to System.Web.Http;
• Add using System.Web.Http; to your controller;

To add Reference you need to do next steps:

• In Solution Explorer, right-click the project node and click Add Reference.
• In the Add Reference dialog box, select the tab Assemblies, and enter System.Web.Http into search on the right side.
• Select the component System.Web.Http, and then click OK.

Link:

How to: Add or Remove References By Using the Add Reference Dialog Box