operator overriding, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class vector{
    int a,b;
        public vector(){a=0;b=0;}
       public  vector(int a,int b){this.a=a;
                            this.b=b;}
        
    
    public static vector operator+(vector p1,vector p2)
    {
        vector p=new vector();
        p.a=p1.a+p2.a;
        p.b=p1.b+p2.b;
        return p;
    }
         public static vector operator-(vector p1,vector p2)
    {
        vector p=new vector();
        p.a=p1.a-p2.a;
        p.b=p1.b-p2.b;
        return p;
    }
        public static implicit operator int (vector v)
        {
        int ae;
           ae=v.a+v.b;
            return ae;
        }
        public static implicit operator vector (int v)
        {
            vector ae=new vector();
            ae.a=v;
            ae.b=0;
            return ae;
        }
        public void display()
        {
         Console.WriteLine("the point are "+a+" " +b);
        }
    }
    public class Program
    {
        public static void Main(string[] args)
        {
           vector v1=new vector(1,2);
           vector v2=new vector(2,3);
           vector v3=new vector();
            v3.display();
            v3=v1+v2;
            v3.display();
            v2.display();
            int a;
            a=v3;
            Console.WriteLine(a);
            int b=10;
            vector v4=new vector();
            v4=b;
            v4.display();
            v3=v2-v1;
            v3.display();
        }
    }
}

Show compiler warnings [ - ] Show input
Compilation time: 0,16 sec, absolute running time: 0,09 sec, cpu time: 0,08 sec, average memory usage: 13 Mb, average nr of threads: 3