What is difference between internal and protected internal access specifiers

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internal can be accessed by any code in the assembly in which it is declared, or from within a derived class in another assembly

protected internal type or member can be accessed by any code in the same assembly, but not from another assembly.

protected internal can be accessed by any code in the assembly in which it is declared, or from within a derived class in another assembly

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The type or member can be accessed by any code in the assembly in which it is declared, or from within a derived class in another assembly. Access from another assembly must take place within a class declaration that derives from the class in which the protected internal element is declared, and it must take place through an instance of the derived class type.

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