using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Dictionary<int,string> dict_1 =new Dictionary<int, string>();

        dict_1.Add(1,"a");

        dict_1.Add(2,"b");

        dict_1.Add(3,"c");

        Dictionary<int, string> dict_2 =new Dictionary<int,string>(dict_1);

        dict_1.Remove(1);//affects dict_2 also which should not happen. 

        Console.WriteLine(dict_1.Count);

        Console.WriteLine(dict_2.Count);

    }

}