In the .NET Framework 4.6.2, the runtime throws a `T:System.NullReferenceException` when retrieving a `P:System.Web.HttpRuntime.AppDomainAppPath` value that includes null characters.
In the .NET Framework 4.6.1 and earlier versions, the runtime throws an `T:System.ArgumentNullException`.
- [ ] Quirked
- [X] Build-time break
### Recommended Action
You can do either of the follow to respond to this change:
- Handle the `T:System.NullReferenceException` if you application is running on the .NET Framework 4.6.2.
- Upgrade to the .NET Framework 4.7, which restores the previous behavior and throws an `T:System.ArgumentNullException`.
