What Are the Default Visibility Levels for Classes, Members, and Other Types in C#?

Default visibility of C# classes and members

Understanding the default visibility levels of various entities in C# is critical to maintaining code organization and accessibility. Let’s get into the specifics:

Class visibility:

• Classes defined directly within a namespace have internal visibility by default, which means they can only be accessed by the assembly containing the code.
• Nested classes have private visibility by default, limiting their accessibility to parent classes.

Field and method visibility:

• Fields and methods in classes and structures have private visibility by default, limiting their scope to the containing declaration.

Enum visibility:

• Enumerations defined within a namespace have public visibility by default, allowing access by any code within the assembly.

Interface visibility:

The
• interface has internal visibility by default, limiting its use to code within the assembly.

Delegate visibility:

• Delegates behave like classes and structs, with internal visibility when defined within a namespace, and private visibility when nested.

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