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C# program to merge two Dictionaries
Set the two dictionaries −
Dictionary < string, int > dict1 = new Dictionary < string, int > (); dict1.Add("laptop", 1); dict1.Add("desktop", 2); Dictionary < string, int > dict2 = new Dictionary < string, int > (); dict2.Add("desktop", 3); dict2.Add("tablet", 4); dict2.Add("mobile", 5);
Now use HashSet and UnionWith() method to merge the two dictionaries −
HashSet < string > hSet = new HashSet < string > (dict1.Keys); hSet.UnionWith(dict2.Keys);
Here is the complete code −
Example
using System; using System.Collections.Generic; class Program { static void Main() { Dictionary < string, int > dict1 = new Dictionary < string, int > (); dict1.Add("laptop", 1); dict1.Add("desktop", 2); Dictionary < string, int > dict2 = new Dictionary < string, int > (); dict2.Add("desktop", 3); dict2.Add("tablet", 4); dict2.Add("mobile", 5); HashSet < string > hSet = new HashSet < string > (dict1.Keys); hSet.UnionWith(dict2.Keys); Console.WriteLine("Merged Dictionary..."); foreach(string val in hSet) { Console.WriteLine(val); } } }
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