CLR notes: 6. Types and Membership Basics

1.Class visibility has public and internal two, public is visible to all assemblies, and internal is visible only to the assembly in which it resides. The default is public.

2. Friend assembly,

Using friend assembly, you can implement unit testing without using reflection technology.

The book is about compiling according to the command line.

I tested it with the VS2005 solution, as follows:

3. Accessibility of Members

Members are private by default, and members of the interface type are public.

When a subclass overrides a member of the parent class, the original member has the same accessibility--c# as the overriding member; the CLR's constraint is that the overriding member's accessibility cannot be lower.

The CLR and C # are not the same, such as tables:

CLR terminology	C # Terminology
Private	Private
Family	Protected
Family and Assembly	does not support
Assembly	Internal
Family or Assembly	protected internal
Public	Public

4. Static Class

Static can only be used for class and cannot be used for struct because the CLR requires that the value be instantiated and cannot control the instantiation process.

C # constraints on static classes:

Static classes must derive directly from System.Object

Static classes cannot implement any interfaces

Static classes can only define static members: Fields, methods, properties, events

Static classes cannot be used as: fields, methods, arguments, local variables.

In MSIL, ctor is not generated for static classes, which are marked as abstract and sealed