Access modifier keywords used to specify declare accessibility of a member or a type.
1) Access Modifiers
Public
The type or member can be accessed by any other code
in the same assembly or another assembly that references it.
Private
The type or member can be accessed only by code in
the same class or struct.
Protected
The type or member can be accessed only by code in
the same class or struct, or in a class that is derived from that class.
Internal
The type or member can be accessed by any code in
the same assembly, but not from another assembly.
Protected Internal
The type or member can be accessed by any code in
the assembly in which it is declared, or from within a derived class in another
assembly. Access from another assembly must take place within a class
declaration that derives from the class in which the protected internal element
is declared, and it must take place through an instance of the derived class
type.
