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HybridDictionary Class in C#?
The HybridDictionary class implements IDictionary by using a ListDictionary while the collection is small, and then switching to a Hashtable when the collection gets large.
Following are the properties of the HybridDictionary class −
| Sr.No | Property & Description |
|---|---|
| 1 | Count Gets the number of key/value pairs contained in the HybridDictionary. |
| 2 | IsFixedSize Gets a value indicating whether the HybridDictionary has a fixed size. |
| 3 | IsReadOnly Gets a value indicating whether the HybridDictionary is read-only. |
| 4 | IsSynchronized Gets a value indicating whether the HybridDictionary is synchronized (thread safe). |
| 5 | Item[Object] Gets or sets the value associated with the specified key. |
| 6 | Keys Gets an ICollection containing the keys in the HybridDictionary. |
| 7 | SyncRoot Gets an object that can be used to synchronize access to the HybridDictionary. |
| 8 | Values Gets an ICollection containing the values in the HybridDictionary. |
Following are some of the methods of the HybridDictionary class −
| Sr.No | Methods & Description |
|---|---|
| 1 | Add(Object, Object) Adds an entry with the specified key and value into the HybridDictionary. |
| 2 | Clear() Removes all entries from the HybridDictionary. |
| 3 | Contains(Object) Determines whether the HybridDictionary contains a specific key.p> |
| 4 | CopyTo(Array, Int32) Copies the HybridDictionary entries to a onedimensional Array instance at the specified index. |
| 5 | Equals(Object) Determines whether the specified object is equal to the current object. (Inherited from Object) |
| 6 | GetEnumerator() Returns an IDictionaryEnumerator that iterates through the HybridDictionary. |
| 7 | GetHashCode() Serves as the default hash function. (Inherited from Object) |
| 8 | GetType() Gets the Type of the current instance. (Inherited from Object) |
To count the number of key/value pairs in HybridDictionary, the code is as follows −
Example
Let us now see some examples −
using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
public static void Main() {
HybridDictionary dict1 = new HybridDictionary();
dict1.Add("A", "SUV");
dict1.Add("B", "MUV");
dict1.Add("C", "AUV");
Console.WriteLine("HybridDictionary1 elements...");
foreach(DictionaryEntry d in dict1) {
Console.WriteLine(d.Key + " " + d.Value);
}
Console.WriteLine("Count of Key/value pairs in Dictionary1 = "+dict1.Count);
HybridDictionary dict2 = new HybridDictionary();
dict2.Add("1", "One");
dict2.Add("2", "Two");
dict2.Add("3", "Three");
dict2.Add("4", "Four");
dict2.Add("5", "Five");
dict2.Add("6", "Six");
Console.WriteLine("
HybridDictionary2 elements...");
foreach(DictionaryEntry d in dict2) {
Console.WriteLine(d.Key + " " + d.Value);
}
Console.WriteLine("Count of Key/value pairs in Dictionary2 = "+dict1.Count);
dict2.Clear();
Console.WriteLine("Count of Key/value pairs in Dictionary2 (Updated) = "+dict2.Count);
}
}Output
This will produce the following output −
HybridDictionary1 elements... A SUV B MUV C AUV Count of Key/value pairs in Dictionary1 = 3 HybridDictionary2 elements... 1 One 2 Two 3 Three 4 Four 5 Five 6 Six Count of Key/value pairs in Dictionary2 = 3 Count of Key/value pairs in Dictionary2 (Updated) = 0
To check if HybridDictionary is synchronized, the code is as follows −
Example
using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
public static void Main() {
HybridDictionary dict1 = new HybridDictionary();
dict1.Add("A", "Books");
dict1.Add("B", "Electronics");
dict1.Add("C", "Smart Wearables");
dict1.Add("D", "Pet Supplies");
dict1.Add("E", "Clothing");
dict1.Add("F", "Footwear");
Console.WriteLine("HybridDictionary1 elements...");
foreach(DictionaryEntry d in dict1) {
Console.WriteLine(d.Key + " " + d.Value);
}
Console.WriteLine("Is the HybridDictionary1 having fixed size? = "+dict1.IsFixedSize);
Console.WriteLine("If HybridDictionary1 read-only? = "+dict1.IsReadOnly);
Console.WriteLine("Is HybridDictionary1 synchronized = "+dict1.IsSynchronized);
HybridDictionary dict2 = new HybridDictionary();
dict2.Add("1", "One");
dict2.Add("2", "Two");
dict2.Add("3", "Three");
dict2.Add("4", "Four");
dict2.Add("5", "Five");
dict2.Add("6", "Six");
Console.WriteLine("
HybridDictionary2 elements...");
foreach(DictionaryEntry d in dict2) {
Console.WriteLine(d.Key + " " + d.Value);
}
Console.WriteLine("Is HybridDictionary1 equal to HybridDictionary2? = "+(dict1.Equals(dict2)));
Console.WriteLine("Is the HybridDictionary2 having fixed size? = "+dict2.IsFixedSize);
Console.WriteLine("If HybridDictionary2 read-only? = "+dict2.IsReadOnly);
Console.WriteLine("Is HybridDictionary2 synchronized = "+dict2.IsSynchronized);
}
}Output
This will produce the following output −
HybridDictionary1 elements... A Books B Electronics C Smart Wearables D Pet Supplies E Clothing F Footwear Is the HybridDictionary1 having fixed size? = False If HybridDictionary1 read-only? = False Is HybridDictionary1 synchronized = False HybridDictionary2 elements... 1 One 2 Two 3 Three 4 Four 5 Five 6 Six Is HybridDictionary1 equal to HybridDictionary2? = False Is the HybridDictionary2 having fixed size? = False If HybridDictionary2 read-only? = False Is HybridDictionary2 synchronized = False
Updated on: 16-Dec-2019
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