C(...) {...}is exactly equivalent to
C(...): base() {...}end note] Paragraph 31 The scope of the parameters given by the formal-parameter-list of an instance constructor declaration includes the constructor initializer of that declaration. 2 Thus, a constructor initializer is permitted to access the parameters of the constructor. [Example: For example:
class A { public A(int x, int y) {} } class B: A { public B(int x, int y): base(x + y, x - y) {} }end example] Paragraph 41 An instance constructor initializer cannot access the instance being created. 2 Therefore it is a compile-time error to reference this in an argument expression of the constructor initializer, as it is a compile-time error for an argument expression to reference any instance member through a simple-name.
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