Grabbing ahold of a resource in regular web forms varies from grabbing a hold of a resource in DotNetNuke implementations.

string value = GetLocalResourceObject(myMagicString)?.ToString();

If you have SomethingFunAndMagic.Text as a line item in your resource then "SomethingFunAndMagic.Text" needs to be in the myMagicString variable here to retrieve a resource in the traditional web forms flavored way. The DotNetNuke way of doing things would allow you to just hand in "SomethingFunAndMagic" and it would append the ".Text" for you.