Get an enumerator that iterates through the Hashtable in C#

To get an enumerator that iterates through the Hashtable, the code is as follows −

Example

 Live Demo

using System; using System.Collections; public class Demo {    public static void Main(){       Hashtable hash = new Hashtable(10);       hash.Add("1", "A");       hash.Add("2", "B");       hash.Add("3", "C");       hash.Add("4", "D");       hash.Add("5","E");       hash.Add("6", "F");       hash.Add("7", "G");       hash.Add("8","H");       hash.Add("9", "I");       hash.Add("10", "J");       Console.WriteLine("Hashtable Key and Value pairs...");       foreach(DictionaryEntry entry in hash){          Console.WriteLine("{0} and {1} ", entry.Key, entry.Value);       }       Console.WriteLine("Is the Hashtable having fixed size? = "+hash.IsFixedSize);       Console.WriteLine("Count of entries in Hashtable = "+ hash.Count);       Console.WriteLine("
Enumerator to iterate through the Hashtable...");       IDictionaryEnumerator demoEnum = hash.GetEnumerator();       while (demoEnum.MoveNext())          Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);       hash.Clear();    } }

Output

This will produce the following output −

Hashtable Key and Value pairs... 10 and J 1 and A 2 and B 3 and C 4 and D 5 and E 6 and F 7 and G 8 and H 9 and I Is the Hashtable having fixed size? = False Count of entries in Hashtable = 10 Enumerator to iterate through the Hashtable... Key = 10, Value = J Key = 1, Value = A Key = 2, Value = B Key = 3, Value = C Key = 4, Value = D Key = 5, Value = E Key = 6, Value = F Key = 7, Value = G Key = 8, Value = H Key = 9, Value = I

Example

Let us see another example −

 Live Demo

using System; using System.Collections; public class Demo {    public static void Main(){       Hashtable hash = new Hashtable(10);       hash.Add("One", "A");       hash.Add("Two", "B");       hash.Add("Three", "C");       hash.Add("Four", "D");       hash.Add("Five","E");       hash.Add("Six", "F");       Console.WriteLine("Hashtable Key and Value pairs...");       Console.WriteLine("
Enumerator to iterate through the Hashtable...");       IDictionaryEnumerator demoEnum = hash.GetEnumerator();       while (demoEnum.MoveNext())          Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);       hash.Clear();    } }

Output

This will produce the following output −

Hashtable Key and Value pairs... Enumerator to iterate through the Hashtable... Key = One, Value = A Key = Five, Value = E Key = Three, Value = C Key = Two, Value = B Key = Four, Value = D Key = Six, Value = F