c# - Encapsulation : what Getter returns? -

in encapsulation readonly set write only

why output 11110 when not using special member function?

code:

class practice_4 {     static void main(string[] args)     {         example abc = new example();        // abc.roll_ = 11;         console.writeline(abc.roll_ );         console.readline();      } }  class example {    private int roll  = 11110;    public int roll_    {               {            return roll ;        }        //set{        //    if (value > 10)        //    { roll = value; }        //    else        //    { console.writeline("error"); }         //}    }    //public example()    //{    //    roll = 110;    //}  } 

output :

11110

but when use special member function : public example()

class practice_4 {     static void main(string[] args)     {         example abc = new example();          console.writeline(abc.roll_ );         console.readline();      } }  class example {    private int roll  = 11110;    public int roll_    {               {            return roll ;        }     }    public example()    {        roll = 110;    }  } 

so display output:

110

and discard 11110

to answer question "why output 11110 when not using special member function?"

the special member function in class constructor of class, means special function initializes/constructs object class definition, rule remember here is, constructors called after private variables statements , when constructor finished construction finished, means class's internal state(variables) assigned(among other things).

however if initialize private variables in private int roll = 11110; line, line executes before constructor called. overwriting value of roll in constructor, value of private variable gets overwritten.