Default Access Modifiers in C# OOP
Here is a list of default access modifiers on different C# objects .
Internal
- Classes and Structs:
internalaccess modifiers are used by default if no access modifier is supplied when defining a class or struct. This indicates that only within the same assembly may the class or struct be accessed. - Interfaces : Their default access modifier is
internalif none is given when it is defined. This indicates that only users of the same assembly can access the interface. - Delegates: The default access modifier when defining a delegate type is also
internal. This indicates that only members of the same assembly may access the delegates. - Fields and Methods:
internalis the default value for any field or method that is specified inside of a class or struct without an access modifier. - Properties: If a property is declared without an access modifier, it defaults to
internal.
Public
In C#, there is only one member with a default access modifier of public, and that is the constructor. If no access modifier is specified for a constructor, it defaults to public, meaning it can be accessed from anywhere in the code, both within the same assembly and in other assemblies.
Implemented methods inside a class that are originating from an Interface has a default modifier of public.
Private
- Fields: A field’s default access level is
privateif it is declared inside of a class or struct without an access modifier. The field can only be accessed from inside the same class or struct, according to this statement. - Methods: Methods are declared inside one without an access modifier, it is assumed to be
private. This indicates that a method is exclusively accessible from within a single class or struct. - Properties: A property’s default access level is
privateif it is declared inside of a class or struct without an access modifier. This indicates that a property is exclusively accessible from within a single class or struct. - Nested Types: If a nested class, struct, interface or enum is declared within a class or struct without an access modifier, it also defaults to
private. This means that the nested type can only be accessed within the same class or struct.
Protected
There are no members in C# with a default access modifier of protected.
Static
There are no members in C# with a default access modifier of static.
Sealed
static classes are sealed by default. Other than that, there are no objects having sealed modifier by default.
Abstract
There are no objects in C# with a default access modifier of abstract.
Partial
There are no objects in C# with a default partial modifier.
Private Protected
There are no objects in C# with a default Private Protected modifier.
Protected internal
There are no objects in C# with a default Protected Internal modifier.
Important!
Interfaces can not have default access modifiers other than public. But remember that there is “Explicit interface implementation”, which effectively makes the members of the interface inaccessible from outside the implementing class or struct like private.
Interfaces in C# do not have a default access modifier. When declaring an interface, you must explicitly specify its access modifier. This means that an interface can be declared as public, internal, protected, or private, depending on the needs of your application.
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