Question

As the title says, how do you use reflection to check if a class definition is defined as internal? “typeof(…)” returns certain properties shown below but not whether a class is defined as internal. Looked on Google but all I could find were lots of articles about running internal or protected methods using reflection. It’s not the methods I’m interested in this case, but the class definition.

var type = typeof(Customer);
Assert.IsTrue(type.IsClass);
Assert.That(type.IsAbstract, Is.EqualTo(isAbstract));
Assert.That(type.IsPublic, Is.EqualTo(isPublic));
Assert.That(type.IsPublic, Is.EqualTo(isPublic));
Assert.That(type.IsSealed, Is.EqualTo(isSealed));
Assert.That(type.IsSerializable, Is.EqualTo(isSerializable));

Answer 1

This is a classic issue. From MSDN:

The C# keywords protected and internal have no meaning in IL and are not used in the Reflection APIs. The corresponding terms in IL are Family and Assembly. To identify an internal method using Reflection, use the IsAssembly property. To identify a protected internal method, use the IsFamilyOrAssembly.

Reflection does not expose a way on Type check if it is internal, protected or protected internal.