Check if Hashtable is read-only in C#

To check if Hashtable is read-only, the code is as follows −

Example

 Live Demo

using System; using System.Collections; public class Demo {    public static void Main(){       Hashtable hash = new Hashtable();       hash.Add("One", "Katie");       hash.Add("Two", "John");       hash.Add("Three", "Barry");       hash.Add("Four", "");       hash.Add("Five","Harry");       hash.Add("Six", "F");       hash.Add("Seven", "Tom");       hash.Add("Eight","Andy");       hash.Add("Nine", "I");       hash.Add("Ten", "Tim");       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("If Hashtable read-only? = "+hash.IsReadOnly);    } }

Output

This will produce the following output −

Hashtable Key and Value pairs... One and Katie Ten and Tim Five and Harry Three and Barry Seven and Tom Two and John Four and Eight and Andy Nine and I Six and F Is the Hashtable having fixed size? = False If Hashtable read-only? = False

Example

Let us see another example-

 Live Demo

using System; using System.Collections; public class Demo {    public static void Main(){       Hashtable hash = new Hashtable();       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 Hashtable having fixed size? = "+hash.IsFixedSize);       Console.WriteLine("If Hashtable read-only? = "+hash.IsReadOnly);    } }

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 Hashtable having fixed size? = False If Hashtable read-only? = False