C# | Remove all elements from the SortedSet

SortedSet class represents the collection of objects in sorted order. This class comes under the System.Collections.Generic namespace. SortedSet<T>.Clear Method is used to remove the all elements from the SortedSet.

Properties:

• In C#, SortedSet class can be used to store, remove or view elements.
• It maintains ascending order and does not store duplicate elements.
• It is suggested to use SortedSet class if you have to store unique elements and maintain ascending order.

Syntax:

mySortedSet.Clear();

Here, mySortedSet is the name of the SortedSet.

Below given are some examples to understand the implementation in a better way:

Example 1:

// C# code to remove all the elements
// from SortedSet
using System;
using System.Collections.Generic;

class GFG {

    // Driver code
    public static void Main()
    {

        // Creating a SortedSet of strings
        SortedSet<string> mySortedSet = new SortedSet<string>();

        // adding elements in mySortedSet
        mySortedSet.Add("A");
        mySortedSet.Add("B");
        mySortedSet.Add("C");
        mySortedSet.Add("D");
        mySortedSet.Add("E");

        // Displaying number of elements in mySortedSet
        // before Removing all the elements
        Console.WriteLine("Number of elements in mySortedSet are : "
                                               + mySortedSet.Count);

        // Displaying the element in mySortedSet
        foreach(string str in mySortedSet)
        {
            Console.WriteLine(str);
        }

        // Removing all the elements from mySortedSet
        mySortedSet.Clear();

        // Displaying number of elements in mySortedSet
        // after Removing all the elements
        Console.WriteLine("Number of elements in mySortedSet are : "
                                               + mySortedSet.Count);
    }
}

Output:

Number of elements in mySortedSet are : 5
A
B
C
D
E
Number of elements in mySortedSet are : 0

Example 2:

// C# code to remove all the elements
// from SortedSet
using System;
using System.Collections.Generic;

class GFG {

    // Driver code
    public static void Main()
    {

        // Creating a SortedSet of integers
        SortedSet<int> mySortedSet = new SortedSet<int>();

        // adding elements in mySortedSet
        for (int i = 1; i <= 6; i++) {
            mySortedSet.Add(2 * i + 1);
        }

        // Displaying number of elements in mySortedSet
        // before Removing all the elements
        Console.WriteLine("Number of elements in mySortedSet are : "
                                               + mySortedSet.Count);

        // Displaying the element in mySortedSet
        foreach(int i in mySortedSet)
        {
            Console.WriteLine(i);
        }

        // Removing all the elements from mySortedSet
        mySortedSet.Clear();

        // Displaying number of elements in mySortedSet
        // after Removing all the elements
        Console.WriteLine("Number of elements in mySortedSet are : "
                                               + mySortedSet.Count);
    }
}

Output:

Number of elements in mySortedSet are : 6
3
5
7
9
11
13
Number of elements in mySortedSet are : 0

Reference:

• https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.sortedset-1.clear?view=netcore-2.1