Collections in C#

#A collection in C# is a HashSet. HashSet in C# eliminates duplicate strings or elements in an array. In C#, it is an optimized set collection

Declare HashSet -

var h = new HashSet(arr1);

Above, we have set the declared array arr1 in the HashSet.

Now set it on the array to remove duplicate words -

string[] arr2 = h.ToArray();

Let us see an example of removing duplicate strings using C# HashSet.

Here, we have repeated elements -

Example

using System; using System.Collections.Generic; using System.Linq; class Program { static void Main() { string[] arr1 = {"Table","Chair","Pen","Clip","Table"}; Console.WriteLine(string.Join(",", arr1)); // HashSet var h = new HashSet(arr1); // eliminates duplicate words string[] arr2 = h.ToArray(); Console.WriteLine(string.Join(",", arr2)); } }

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