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A class’s members are all the members that are declared in the class, with the exceptions to constructors and finalizers. If we declare a member as private, it means that the it is declared in the base classes (and are inherited when instantiated), however it is not accessible from derived classes (or instantiated objects). On the flip side, public members are accessible by the instantiated objects without any restriction. The term public and private is also known as access modifier. If the access modifier is not specified, the default access modifier of the class member would be internal. Below are all the list of access modifiers available in the Microsoft Visual Studio C#.

• public: The type or member can be accessed by any other code in the same assembly or another assembly that references it.
• private: The type or member can be accessed only by code in the same class or struct.
• protected: The type or member can be accessed only by code in the same class, or in a class that is derived from that class.
• internal: The type or member can be accessed by any code in the same assembly, but not from another assembly.
• protected internal: The type or member can be accessed by any code in the assembly in which it’s declared, or from within a derived class in another assembly.
• private protected: The type or member can be accessed only within its declaring assembly, by code in the same class or in a type that is derived from that class.

Common Questions
What is the default access modifier for a Class in C#?
The default access modifier for a class is Internal.

What is internal access modifier in C#?
If a member access modifier is defined as Internal, the members are accessible only within files in the same assembly (.dll). In other words, the access is limited exclusively to classes defined within the current project assembly.