"Learning Notes" C # Construction and destruction

• Construction method
  • The constructor method is a special method that is responsible for initializing the object
  • The constructor method name must match the class name
  • The construction method has no return value, but can have parameters that can overload
  • The construction method can not be written, and the system automatically adds an argument-free default construct to the class
  • If you set the construction method to private, you can no longer use this construct to create an instance
• Destruction
  • Destructors are called when an object is destroyed to free memory
  • A class can have only one destructor method
  • Destructors do not return values and parameters and cannot be overloaded
  • The destructor method is automatically called by the system and cannot be called manually.
  • destructor does not have modifiers
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  1 usingSystem;2 3 namespaceFunctionDemo24 {5      Public class Person6     {7          Public stringname;8          Public intAge ;9         //Construction Method-responsible for initializing the objectTen         //1. The method name of the construction method must be the same as the class name One         //2. The construction method has no return value and does not require write void A  -         //3. Constructor method to add parameters -          PublicPerson (stringNameintAge ) the         { -             //Initializing member variables -              This. Name =name; -              This. Age =Age ; +Console.WriteLine ("Construction"); -         } +  A         //4. Construction method allows overloading at          PublicPerson () -         { -Name ="Li"; -Age = -; -  -         } in         //5. If you do not add a constructor method to a class, the system provides a default construct -         //6. If we set a construction method to a private class, we are not allowed to create the object through this construct to         //Private person () +         //{ -  the         //} *         //destructor-Called when an object is destroyed to free memory $         //1. Each class can have only one destructor methodPanax Notoginseng         //2. Destructors cannot have return values -         //3. Destructors cannot have access modifiers the         //4. Destructors cannot have parameters and cannot be overloaded +         //5. Destructors are automatically called by the system and cannot be called manually A~Person () the         { +Console.WriteLine ("Destruction"); -         } $     } $     class Program -     { -         Static voidMain (string[] args) the         { -             //When you create an object using the New keyword, you have called the construction methodWuyiPerson p =NewPerson ("Li", in); the Console.WriteLine (p.name); - Console.WriteLine (p.age); Wu  -Console.WriteLine ("The main function ends and the program is ready to exit! "); About  $             //Person p2 = new Person (); -             //Console.WriteLine (p2.name); -             //Console.WriteLine (p2.age); -  A         } +     } the}

"Learning Notes" C # Construction and destruction