Access modifiers (public, private, internal) in C Sharp (C#) - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the public access modifier mean in C#?

The <strong>public</strong> modifier means the member or class is accessible from anywhere in the program or other programs that reference it. It's like a door open to everyone.

beginner

What is the purpose of the private access modifier?

The <strong>private</strong> modifier restricts access to the member or class so it can only be used inside the same class. Think of it as a secret only the class knows.

intermediate

Explain the internal access modifier in C#.

The internal modifier allows access only within the same assembly (project). It's like a private room shared only with people in the same building.

beginner

Which access modifier is the default for class members if none is specified?

If no access modifier is specified for class members, the default is <strong>private</strong>. So, members are hidden unless you say otherwise.

beginner

Can a <strong>private</strong> member be accessed from another class in the same assembly?

No, <strong>private</strong> members are only accessible inside their own class, even if another class is in the same assembly.

Which access modifier allows a class member to be accessed from any other code in the same assembly or another assembly?

A public

B private

C internal

D protected

The public modifier allows access from anywhere, including other assemblies.

What is the default access level for members of a class if no modifier is specified?

A protected

B public

C internal

D private

Class members are private by default if no access modifier is given.

Which access modifier restricts access to the same assembly only?

A internal

B public

C private

D protected internal

internal limits access to the same assembly.

Can a private member be accessed from a derived class?

A Yes, always

B No, never

C Yes, if in the same assembly

D Only if marked protected

private members are not accessible outside their own class, even in derived classes.

Which modifier would you use to allow access only within the same class and derived classes?

A public

B private

C protected

D internal

protected allows access within the class and its subclasses.

Describe the differences between public, private, and internal access modifiers in C#.

Think about who can open the door to the member or class.

Explain why you might choose to use private instead of public for a class member.

Consider keeping secrets safe inside a class.