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  1. using System;
  2. using System.Collections.Generic;
  3.  
  4. class HashSet
  5. {
  6.     static void Main()
  7.     {
  8.         HashSet<String> cars = new HashSet<String>();
  9.         HashSet<String> trucks = new HashSet<String>();
  10.  
  11.         cars.Add ("Tesla M3");
  12.         cars.Add ("Ford Mustang");
  13.         cars.Add ("Chevy Camaro");
  14.  
  15.         cars.Add ("Tesla M3"); // error, can't add Musta again
  16.  
  17.         trucks.Add ("Ford F150");
  18.         trucks.Add ("Chevy Siverado");
  19.         trucks.Add ("Dodge Ram");
  20.  
  21.         Console.Write ("cars contains {0} elements: ", cars.Count);
  22.         DisplaySet (cars);
  23.  
  24.         Console.Write("trucks contains {0} elements: ", trucks.Count);
  25.         DisplaySet (trucks);
  26.  
  27.         // Create a new HashSet with both cars and trucks
  28.         HashSet<String> allClassMembers = new HashSet<String>(cars);
  29.         Console.WriteLine ("allClassMembers UnionWith trucks ...");
  30.         allClassMembers.UnionWith (trucks);
  31.  
  32.         Console.Write ("allClassMembers contains {0} elements: ", allClassMembers.Count);
  33.         DisplaySet (allClassMembers);
  34.  
  35.     }
  36.  
  37.     private static void DisplaySet (HashSet<String> set)
  38.     {
  39.         Console.Write ("{");
  40.         foreach (String i in set)
  41.         {
  42.                 Console.Write (" {0}", i);
  43.         }
  44.         Console.WriteLine (" }");
  45.     }
  46. } // HashSet
Success #stdin #stdout 0.03s 26556KB
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stdin
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Standard input is empty
stdout
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cars contains 3 elements: { Tesla M3 Ford Mustang Chevy Camaro }
trucks contains 3 elements: { Ford F150 Chevy Siverado Dodge Ram }
allClassMembers UnionWith trucks ...
allClassMembers contains 6 elements: { Tesla M3 Ford Mustang Chevy Camaro Ford F150 Chevy Siverado Dodge Ram }
https://ideone.com/PwzYZS
language:
C# (gmcs 5.20.1)
created:
1 day ago
visibility:
public

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