C # public, private, protected, internal, protected internal,

C # public, private, protected, internal, protected internal,
C # public, private, protected, internal, protected internal

Public access. Not limited.
Private access. Only access by members of this category is allowed.
Protected protects access. The instance cannot be accessed only by the class or subclass.
Internal access. It is restricted to access within the project, and others cannot be accessed.
Protected internal internally protects access. Only access to this project or subclass is allowed.

Note: An assembly does not represent a namespace. Different assembly may have the same namespace.