SortedDictionary.Remove() Method in C#

The SortedDictionary.Remove() method in C# is used to remove the element with the specified key from the SortedDictionary<TKey, TValue>.

Output

The syntax is as follows −

public bool Remove (TKey key);

Above, the parameter key is the key of the element to remove.

Example

Let us now see an example −

 Live Demo

using System;
using System.Collections;
using System.Collections.Generic;
public class Demo {
   public static void Main(){
      SortedDictionary<int, string> sortedDict = new SortedDictionary<int, string>();
      sortedDict.Add(100, "Mobile");
      sortedDict.Add(200, "Laptop");
      sortedDict.Add(300, "Desktop");
      sortedDict.Add(400, "Speakers");
      sortedDict.Add(500, "Headphone");
      sortedDict.Add(600, "Earphone");
      Console.WriteLine("SortedDictionary key-value pairs...");
      IDictionaryEnumerator demoEnum = sortedDict.GetEnumerator();
      while (demoEnum.MoveNext())
         Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
      Console.WriteLine("
Key 400 removed from SortedDictionary? = "+sortedDict.Remove(400));
      Console.WriteLine("
SortedDictionary key-value pairs...UPDATED");
      demoEnum = sortedDict.GetEnumerator();
      while (demoEnum.MoveNext())
         Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
      SortedDictionary<int, string>.KeyCollection keyColl = sortedDict.Keys;
      Console.WriteLine("
Keys...list");
      foreach( int i in keyColl ){
         Console.WriteLine(i);
      }
   }
}

Output

This will produce the following output −

SortedDictionary key-value pairs...
Key = 100, Value = Mobile
Key = 200, Value = Laptop
Key = 300, Value = Desktop
Key = 400, Value = Speakers
Key = 500, Value = Headphone
Key = 600, Value = Earphone
Key 400 removed from SortedDictionary? = True
SortedDictionary key-value pairs...UPDATED
Key = 100, Value = Mobile
Key = 200, Value = Laptop
Key = 300, Value = Desktop
Key = 500, Value = Headphone
Key = 600, Value = Earphone
Keys...list
100
200
300
500
600

Example

Let us now see another example −

 Live Demo

using System;
using System.Collections;
using System.Collections.Generic;
public class Demo {
   public static void Main(){
      SortedDictionary<int, string> sortedDict = new SortedDictionary<int, string>();
      sortedDict.Add(1, "Ultrabook");
      sortedDict.Add(2, "Alienware");
      sortedDict.Add(3, "Notebook");
      sortedDict.Add(4, "Connector");
      sortedDict.Add(5, "Flash Drive");
      sortedDict.Add(6, "SSD");
      sortedDict.Add(7, "HDD");
      sortedDict.Add(8, "Earphone");
      Console.WriteLine("SortedDictionary key-value pairs...");
      IDictionaryEnumerator demoEnum = sortedDict.GetEnumerator();
      while (demoEnum.MoveNext())
         Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
      Console.WriteLine("
Key 7 removed from SortedDictionary? = "+sortedDict.Remove(7));
      Console.WriteLine("
SortedDictionary key-value pairs...UPDATED");
      demoEnum = sortedDict.GetEnumerator();
      while (demoEnum.MoveNext())
         Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
      SortedDictionary<int, string>.KeyCollection keyColl = sortedDict.Keys;
      Console.WriteLine("
Keys...list");
      foreach( int i in keyColl ){
         Console.WriteLine(i);
      }
   }
}

Output

This will produce the following output −

SortedDictionary key-value pairs...
Key = 1, Value = Ultrabook
Key = 2, Value = Alienware
Key = 3, Value = Notebook
Key = 4, Value = Connector
Key = 5, Value = Flash Drive
Key = 6, Value = SSD
Key = 7, Value = HDD
Key = 8, Value = Earphone
Key 7 removed from SortedDictionary? = True
SortedDictionary key-value pairs...UPDATED
Key = 1, Value = Ultrabook
Key = 2, Value = Alienware
Key = 3, Value = Notebook
Key = 4, Value = Connector
Key = 5, Value = Flash Drive
Key = 6, Value = SSD
Key = 8, Value = Earphone
Keys...list
1
2
3
4
5
6
8