C # access modifier of basic knowledge 8,

C # access modifier of basic knowledge 8,
1. Class access modifier

Modifier	Access permission
None or internal	The callback class can only be used in the same assembly.
Public	The same Assembly or any external component that references this assembly can be used as a category.
Abstract or internal abstract	The class can only be inherited from the same assembly. The class cannot be instantiated.
Public abstract	Any other assembly in the same assembly or referenced in the Assembly can be called classes, which cannot be instantiated and can only be inherited.
Sealed or internal sealed	The class can only be in the same Assembly. This class cannot be inherited and can only be instantiated.
Public sealed	The same assembly or other assembly that references the Assembly can be accessed, cannot be inherited, and can only be instantiated

2. Member Modifier

Modifier	Access permission
Public	Access to the same assembly or other assembly that references the Assembly
Private	Accessible in the same class
Protected	Only access from the same class or from a derived class
Internal	Only one set of programs can access
Protect internal	You can access