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C# Program to combine Dictionary of two keys
Firstly, set the Dictionaries to be combined −
Dictionary <string, int> dict1 = new Dictionary <string, int> ();
dict1.Add("one", 1);
dict1.Add("Two", 2);
Dictionary <string, int> dict2 = new Dictionary <string, int> ();
dict2.Add("Three", 3);
dict2.Add("Four", 4);Now, use HashSet to combine them. The method used for the same purpose is UnionWith() −
HashSet <string> hSet = new HashSet <string> (dict1.Keys); hSet.UnionWith(dict2.Keys);
The following is the complete code −
Example
using System;
using System.Collections.Generic;
public class Program {
public static void Main() {
Dictionary <string, int> dict1 = new Dictionary <string, int> ();
dict1.Add("one", 1);
dict1.Add("Two", 2);
Dictionary <string, int> dict2 = new Dictionary <string, int> ();
dict2.Add("Three", 3);
dict2.Add("Four", 4);
HashSet <string> hSet = new HashSet <string> (dict1.Keys);
hSet.UnionWith(dict2.Keys);
Console.WriteLine("Union of Dictionary...");
foreach(string val in hSet) {
Console.WriteLine(val);
}
}
}Output
Union of Dictionary... one Two Three Four
Updated on: 22-Jun-2020
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