visual studio 2010 - Result is getting 0 when using Operator Overloading in C# -

hi have below program , new c#,

using system; using system.collections.generic; using system.linq; using system.text;  namespace unaryoperatoroverload {     public class unaryoperator     {         private int number1;         private int number2;         private int result;         public unaryoperator() { }         public unaryoperator(int number1, int number2)         {             number1 = number1;             number2 = number2;         }         public static unaryoperator operator +(unaryoperator opr)         {             unaryoperator obj = new unaryoperator();             obj.result = obj.number1 + obj.number2;             return obj;         }         public void showdata()         {             console.writeline("the sum of 2 numbers : " + result);         }     }     public class program     {         static void main(string[] args)         {             unaryoperator opr = new unaryoperator(20, 30);             opr.showdata();             console.readline();         }     }  } 

when execute code , getting result 0. not sure went wrong.please me rectify code.

your mistakes:

• you creating new unaryoperator obj = new unaryoperator(); in operator overloading function. obj.number1 , obj.number2 's value 0, because have created obj instance.
• you never calling + operator. add opr = +opr; statement in main method.

change code as:

public class unaryoperator {     private int number1;     private int number2;     private int result;      public unaryoperator() { }     public unaryoperator(int number1, int number2)     {         number1 = number1;         number2 = number2;     }      public static unaryoperator operator +(unaryoperator opr)     {         opr.result = opr.number1 + opr.number2;  // change line         return opr;     }      public void showdata()     {         console.writeline("the sum of 2 numbers : " + result);     } }  public class program {     static void main(string[] args)     {         unaryoperator opr = new unaryoperator(20, 30);         opr = +opr;  // add statement         opr.showdata();         console.readline();     } }