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Hashtable.GetHash(Object) method is used to get the hashcode of the specified key of a Hashtable object. This method is inherited from the Object Class.

Syntax:

protected virtual int GetHash(Object Key);

Exception: This method will give NullReferenceException if the key is null.

Below programs illustrate the use of above-discussed method:

Example 1:

// C# Program to illustrate the // Hashtable.GetHash(Object) methodusing System;using System.Collections; // Inheriting Hashtable as // Hashtable.GetHash(Object) // method is protected methodclass HashCode : Hashtable { // Main Method static void Main(string[] args) { // creating object for HashCode as // to access protected methods we // have to create object for the // derived class HashCode h = new HashCode(); // Add Elements into Hashtable h.Add("1001", "Parek Shetty"); h.Add("1002", "Deshmuk Narayan"); h.Add("1003", "Ratan Kaalikaran"); ICollection Key = h.Keys; foreach(string val in Key) { // printing Hashtable Console.Write(val + " : " + h[val]); Console.Write("\n"); // printing hashcode with keys int hcode = h.GetHash(val); Console.Write(val + " : " + hcode); Console.Write("\n"); } }}Output: 1002 : Deshmuk Narayan 1002 : 985757554 1001 : Parek Shetty 1001 : -1708895167 1003 : Ratan Kaalikaran 1003 : -1892225314

Example 2:

// C# Program to illustrate the // Hashtable.GetHash(Object) methodusing System;using System.Collections; class HashCode : Hashtable { // Main Method static void Main(string[] args) { HashCode h = new HashCode(); // Adding elements h.Add('A', "Pritam Devadhya"); h.Add('B', "Arjun Balachi"); h.Add('C', "Timanad Panigrahi"); ICollection Key = h.Keys; int hcode = h.GetHash('C'); Console.Write("HashCode: " + hcode); }}Output: HashCode: 4390979

Reference:

https://docs.microsoft.com/en-us/dotnet/api/system.collections.hashtable.gethash?view=netframework-4.7.2My Personal Notes arrow_drop_up

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