Access Modifiers (C# Reference)
Access modifiers are keywords used to specify the declared accessibility of a member or a type. This section introduces the four access modifiers:
The following five accessibility levels can be specified using the access modifiers:
public : Access is not restricted.
protected : Access is limited to the containing class or types derived from the containing class.
Internal : Access is limited to the current assembly.
protected internal: Access is limited to the current assembly or types derived from the containing class.
private : Access is limited to the containing type.
This section also introduces the following:
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Accessibility Levels: Using the four access modifiers to declare five levels of accessibility.
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Accessibility Domain: Specifies where, in the program sections, a member can be referenced.
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Restrictions on Using Accessibility Levels: A summary of the restrictions on using declared accessibility levels.