Fórum SO ➡ Merging 2 lists by Name and adding their Values, using LINQ ♦, C#

Fórum SO ➡ Merging 2 lists by Name and adding their Values, using LINQ ♦

//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

#define SHOW_RESULTS
    
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

// aljodav
// http://rextester.com/users/376

// related to a thread in SO
// http://bit.ly/2fghWWo

namespace Rextester
{
    using LO=List<Rextester.Object>;
    using Ob=Rextester.Object;
    
    class Object{
        public string Name;
        public int Value;
    }
    
    class Program
    {
        static LO GetList1(){
            return new LO{
                new Ob{Name="Object1",Value=1},
                    new Ob{Name="Object2",Value=2},
                    new Ob{Name="Object3",Value=3},
                    new Ob{Name="Object4",Value=4},
                    new Ob{Name="Object5",Value=5},
            };
        }
        static LO GetList2(){
            return new LO{
                new Ob{Name="Object5",Value=10},
                    new Ob{Name="Object2",Value=20},
                    new Ob{Name="Object1",Value=30},
            };
        }
        
        public static void Main(string[] args)
        {
            LO newLO=GetList1()
                .GroupJoin(GetList2(),
                    ob1=>ob1.Name,
                    ob2=>ob2.Name,
                    (ob1,ob2s)=>new Ob{
                        Name=ob1.Name,
                        Value=ob1.Value+ob2s.Sum(x=>x.Value)
                    }
                )
                .ToList()
                ;
            
#if SHOW_RESULTS
    
    Console.WriteLine("The type:\n\n{0}\n\n\t\tName\t\tValue",newLO.GetType());
            
    newLO.ForEach(x=>Console.WriteLine("\t\t{0}\t\t{1}",x.Name,x.Value));
    
#endif
    
            Console.WriteLine("\n\nHello, world!");
        }
    }
}


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