How to Merge Dictionary in C# ?

Posted by AbundantCode

There are times when you want to merge 2 dictionary collections to one . Below is a code sample that shows how to do it.

How to Merge Dictionary in C# ?

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
namespace AbundantcodeConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<int, string> dictionary1 = new Dictionary<int, string>();
            dictionary1.Add(1, "item 1");
            dictionary1.Add(2, "item 2");
            Dictionary<int, string> dictionary2 = new Dictionary<int, string>();
            dictionary2.Add(1, "item 1");
            dictionary2.Add(4, "item 4");
            var result = dictionary1.Concat(dictionary2).GroupBy(d => d.Key)
              .ToDictionary(d => d.Key, d => d.First().Value);
            Console.ReadLine();
        }
      
        
    }
    
}
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