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Access Modifiers (C# Programming Guide)
In this articleAll types and type members have an accessibility level. The accessibility level controls whether they can be used from other code in your assembly or other assemblies. An assembly is a .dll or .exe created by compiling one or more .cs files in a single compilation. Use the following access modifiers to specify the accessibility of a type or member when you declare it:
Summary table
The following examples demonstrate how to specify access modifiers on a type and member: public class Bicycle { public void Pedal() { } }Not all access modifiers are valid for all types or members in all contexts. In some cases, the accessibility of a type member is constrained by the accessibility of its containing type. Class, record, and struct accessibilityClasses, records, and structs declared directly within a namespace (in other words, that aren't nested within other classes or structs) can be either public or internal. internal is the default if no access modifier is specified. Struct members, including nested classes and structs, can be declared public, internal, or private. Class members, including nested classes and structs, can be public, protected internal, protected, internal, private protected, or private. Class and struct members, including nested classes and structs, have private access by default. Private nested types aren't accessible from outside the containing type. Derived classes and derived records can't have greater accessibility than their base types. You can't declare a public class B that derives from an internal class A. If allowed, it would have the effect of making A public, because all protected or internal members of A are accessible from the derived class. You can enable specific other assemblies to access your internal types by using the InternalsVisibleToAttribute. For more information, see Friend Assemblies. Class, record, and struct member accessibilityClass and record members (including nested classes, records and structs) can be declared with any of the six types of access. Struct members can't be declared as protected, protected internal, or private protected because structs don't support inheritance. Normally, the accessibility of a member isn't greater than the accessibility of the type that contains it. However, a public member of an internal class might be accessible from outside the assembly if the member implements interface methods or overrides virtual methods that are defined in a public base class. The type of any member field, property, or event must be at least as accessible as the member itself. Similarly, the return type and the parameter types of any method, indexer, or delegate must be at least as accessible as the member itself. For example, you can't have a public method M that returns a class C unless C is also public. Likewise, you can't have a protected property of type A if A is declared as private. User-defined operators must always be declared as public and static. For more information, see Operator overloading. Finalizers can't have accessibility modifiers. To set the access level for a class, record, or struct member, add the appropriate keyword to the member declaration, as shown in the following example. // public class: public class Tricycle { // protected method: protected void Pedal() { } // private field: private int _wheels = 3; // protected internal property: protected internal int Wheels { get { return _wheels; } } }Other typesInterfaces declared directly within a namespace can be public or internal and, just like classes and structs, interfaces default to internal access. Interface members are public by default because the purpose of an interface is to enable other types to access a class or struct. Interface member declarations may include any access modifier. This is most useful for static methods to provide common implementations needed by all implementors of a class. Enumeration members are always public, and no access modifiers can be applied. Delegates behave like classes and structs. By default, they have internal access when declared directly within a namespace, and private access when nested. C# language specificationFor more information, see the C# Language Specification. The language specification is the definitive source for C# syntax and usage. See also
FeedbackSubmit and view feedback for Which access specifier method can be accessible in same class and only inside the package?Default Access Specifiers
A default class is accessible inside the package but it is not accessible from outside the package i.e. all the classes inside the package in which the default class is defined can access this class.
Which access specifier can be accessed inside the class?Understanding Java Access Modifiers. Which access specifier is used in package?Output. Which access specifier should be used in a class?Which access specifier is used when no access specifier is used with a member of class (java)? Explanation: Default access is used if the programmer doesn't specify the specifier.
Which access modifier is accessing in any class or package?Protected Access Modifier - Protected
Variables, methods, and constructors, which are declared protected in a superclass can be accessed only by the subclasses in other package or any class within the package of the protected members' class. The protected access modifier cannot be applied to class and interfaces.
Which access modifier is used to access members outside a package?Public Access Modifiers. Package(Default) Access Modifier.
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