Operation could destabilize the runtime?

Question

I\'m having a little bit of trouble understanding what the problem is here. I have a bit of code that pulls records from a database using LINQ and puts them into an object

Answer 1

I had same problem, but with inheritance I defined a class in assembly A and a subclass in Assembly B after I added below attribute to assembly A, problem solved:

[assembly: SecurityRules(SecurityRuleSet.Level1, SkipVerificationInFullTrust = true)]