Initializing HashSet in C#

To initialize a HashSet.

var h = new HashSet<string>(arr1);

Above, we have set an array in the HashSet. The following is the array −

string[] arr1 = {
   "electronics",
   "accessories”,
   "electronics",
};

The following is an example showing how to implement HashSet in C# −

Example

using System;
using System.Collections.Generic;
using System.Linq;

class Program {
   static void Main() {
      string[] arr1 = {
         "electronics",
         "accessories”,
         "electronics",
      };

      Console.WriteLine(string.Join(",", arr1));

      // HashSet
      var h = new HashSet(arr1);
      // eliminates duplicate words
      string[] arr2 = h.ToArray();
      Console.WriteLine(string.Join(",", arr2));
   }
}

Ankith Reddy

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Updated on: 21-Jun-2020

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