Modifiers (C# Reference)
Modifiers are used to modify declarations of types and type members. This section introduces the C# modifiers:
Specify the declared accessibility of types and type members.
Indicates that a class is intended only to be a base class of other classes.
Specify Specifies that the value of the field or the local variable cannot be modified.
Declares an event.
Indicates that the method is implemented externally.
Hides an inherited member from a base class member.
Provides a new implementation of a virtual member inherited from a base class.
Defines partial classes, structs and methods throughout the same assembly.
Declares a field that can only be assigned values as part of the declaration or in a constructor in the same class.
Specifies that a class cannot be inherited.
Declares a member that belongs to the type itself instead of to a specific object.
Declares an unsafe context.
Declares a method or an accessor whose implementation can be changed by an overriding member in a derived class.
Indicates that a field can be modified in the program by something such as the operating system, the hardware, or a concurrently executing thread.