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C# program to find Union of two or more Dictionaries
Firstly, set both the dictionaries −
Dictionary < string, int > dict1 = new Dictionary < string, int > (); dict1.Add("water", 1); dict1.Add("food", 2); Dictionary < string, int > dict2 = new Dictionary < string, int > (); dict2.Add("clothing", 3); dict2.Add("shelter", 4);
Now, create HashSet and use UnionsWith() method to find the union between the above two Dictionaries −
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("water", 1); dict1.Add("food", 2); Dictionary < string, int > dict2 = new Dictionary < string, int > (); dict2.Add("clothing", 3); dict2.Add("shelter", 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... water food clothing shelter
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