How do I copy the content of a dictionary to an new dictionary in C#?

Question

How can I copy a Dictionary<string, string> to another new Dictionary<string, string> so that they are not the same object?

Answer 1

Assuming you mean you want them to be individual objects, and not references to the same object pass the source dictionary into the destination's constructor:

Dictionary<string, string> d = new Dictionary<string, string>(); Dictionary<string, string> d2 = new Dictionary<string, string>(d); 

"so that they are not the same object."

Ambiguity abound - if you do actually want them to be references to the same object:

Dictionary<string, string> d = new Dictionary<string, string>(); Dictionary<string, string> d2 = d; 

(Changing either d or d2 after the above will affect both)

Answer 2

using System; using System.Collections.Generic;  class Program {     static void Main(string[] args)     {         Dictionary<string, string> first = new Dictionary<string, string>()         {             {"1", "One"},             {"2", "Two"},             {"3", "Three"},             {"4", "Four"},             {"5", "Five"},             {"6", "Six"},             {"7", "Seven"},             {"8", "Eight"},             {"9", "Nine"},             {"0", "Zero"}         };          Dictionary<string, string> second = new Dictionary<string, string>();         foreach (string key in first.Keys)         {             second.Add(key, first[key]);         }          first["1"] = "newone";         Console.WriteLine(second["1"]);     } }