Get an ICollection containing the keys in ListDictionary in C#

To get an ICollection containing the keys in ListDictionary, the code is as follows −

Example

 Live Demo

using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
   public static void Main(){
      ListDictionary listDict = new ListDictionary();
      listDict.Add("1", "Laptop");
      listDict.Add("2", "Tablet");
      listDict.Add("3", "Desktop");
      listDict.Add("4", "Speaker");
      listDict.Add("5", "Earphone");
      listDict.Add("6", "Headphone");
      ICollection col = listDict.Keys;
      foreach(String s in col){
         Console.WriteLine(s);
      }
   }
}

Output

This will produce the following output −

1
2
3
4
5
6

Example

Let us see another example −

 Live Demo

using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
   public static void Main(){
      ListDictionary listDict = new ListDictionary();
      listDict.Add("A", "Tom");
      listDict.Add("B", "John");
      listDict.Add("C", "Kevin");
      listDict.Add("D", "Tim");
      ICollection col = listDict.Keys;
      foreach(String s in col){
         Console.WriteLine(s);
      }
   }
}

Output

This will produce the following output −

A
B
C
D