This PR cleans up the test code by removing unnecessary helper classes and simplifying test patterns. The main changes involved removing the Does abstract class and its implementations (DoesThrow and DoesNotThrow) that were used to create mock test subjects. Instead, the tests now use simple Action and Func<int> delegates directly with lambda expressions like () => throw new Exception() or () => { }. This eliminates the need for the .Invoking(x => x.Do()) pattern and makes the test assertions more direct and readable. Additionally, some test helper classes like SomeTestClass, ExceptionWithProperties, and ExceptionWithEmptyToString were moved to more appropriate locations within the test files.