选项:A. A. public int Age { get; set; } B. B. public int Age() { return age; } set { age = value; } C. C. public int Age { get { return age; } set { age = value; } } D. D. public int Age() { get { return age; } set { age = value; } }
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答案:A. public int Age { get; set; } , C. public int Age { get { return age; } set { age = value; } }