Inheritance security rules violated while overriding member - SecurityRuleSet.Level2

Question

I have a class that inherits from Exception. In .NET 4, I started receiving a runtime error:

Inheritance security rules violated while overriding m

Answer 1

Regarding this error in shared hosting environments that allow full trust applications. When you bin deploy an application, you often overwrite web.config. Under IIS, when you change the trust settings to something different than the default, your web config section is modified with:

Copying a new web.config during deployment often overwrites this setting, however IIS Admin will still show the site as "Full Trust", when in reality the site is running in whatever the default trust level is for your shared host provider (usually medium).

You'll see this error and do what I did - try to figure out why you would see it even though you know the site is running under full trust, when in actuality, it is not. The solution is either to modify your web config as noted above before deployment, or use IIS Admin to set the site to a different trust level (high, for instance), apply it, then set it back to full. Doing so reinserts the necessary config file information and restarts the application pool in full trust.