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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
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