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what is access modifier in c#

Access modifiers (or access specifiers) are keywords in object-oriented languages that set the accessibility of classes, methods, member function, member variables etc. Access modifiers are a specific part of programming language syntax used to facilitate the encapsulation of components, It defines the accessibility of the specific type (e.g class, struct), data member etc.

In c# there are five type of access modifiers -
  • Public
  • Private
  • Protected
  • Internal
  • Protected Internal

Accessibility of access modifies in c#

Access Modifiers
Inside Assembly
Outside Assembly
With Inheritance
With Type
With Inheritance
With Type
Public
ü
ü
ü
ü
Private
X
X
X
X
Protected
ü
X
ü
X
Internal
ü
ü
X
X
Protected Internal
ü
ü
ü
X

Explanation of Public, Protected, Private, Internal And Protected Internal Access Modifier In C#

Public: - Public members are accessible anywhere, inside the type (e.g. - class), outside the type, inside the assembly, outside the assembly, through the inheritance or with the type (e.g. instance of class, with type of class in case of static).

Private: - Private members are only accessible within the own type (Own class).

Protected: - Protected member are accessible only with its derived types whether it is inside the assembly or outside the assembly.

Internal: - Internal member are accessible only within the assembly by inheritance (its derived type) or by instance of class.

Protected Internal: - Protected internal is type of access modifier contains protected member properties as well as internal member properties, means protected internal member accessible inside the assembly in its derived class or with the instance of the class and accessible outside the class only in its derived class.

Protected Internal Property = Protected Property (anywhere in its derived class inside or outside the assembly) + Internal (with instance of class only inside the assembly)


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