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How to create an OrderedDictionary in C#?
To create an OrderedDictionary in C#, the code is as follows −
Example
using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
public static void Main() {
OrderedDictionary dict = new OrderedDictionary();
dict.Add("A", "Books");
dict.Add("B", "Electronics");
dict.Add("C", "Smart Wearables");
dict.Add("D", "Pet Supplies");
dict.Add("E", "Clothing");
dict.Add("F", "Footwear");
Console.WriteLine("OrderedDictionary elements...");
foreach(DictionaryEntry d in dict) {
Console.WriteLine(d.Key + " " + d.Value);
}
Console.WriteLine("Count of elements in OrderedDictionary = " + dict.Count);
dict.Remove("E");
Console.WriteLine("Count of elements in OrderedDictionary (Updated)= " + dict.Count);
}
}Output
This will produce the following output −
OrderedDictionary elements... A Books B Electronics C Smart Wearables D Pet Supplies E Clothing F Footwear Count of elements in OrderedDictionary = 6 Count of elements in OrderedDictionary (Updated)= 5
Example
Let us see another example −
using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
public static void Main() {
OrderedDictionary dict = new OrderedDictionary();
dict.Add("1", "One");
dict.Add("2", "Two");
dict.Add("3", "Three");
dict.Add("4", "Four");
dict.Add("5", "Five");
dict.Add("6", "Six");
dict.Add("7", "Seven");
dict.Add("8", "Eight");
ICollection col = dict.Keys;
String[] strKeys = new String[dict.Count];
col.CopyTo(strKeys, 0);
Console.WriteLine("Displaying the keys...");
for (int i = 0; i < dict.Count; i++) {
Console.WriteLine(strKeys[i]);
}
}
}Output
This will produce the following output −
Displaying the keys... 1 2 3 4 5 6 7 8
Updated on: 10-Dec-2019
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