Check if a SortedList is read-only in C#



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

Example

 Live Demo

using System;
using System.Collections;
public class Demo {
   public static void Main(String[] args) {
      SortedList list = new SortedList();
      list.Add("One", "IT");
      list.Add("Two ", "Operations");
      list.Add("Three", "Marketing");
      list.Add("Four", "Purchase");
      list.Add("Five", "Sales");
      list.Add("Six", "Finance");
      Console.WriteLine("SortedList elements...");
      foreach(DictionaryEntry d in list) {
         Console.WriteLine(d.Key + " " + d.Value);
      }
      Console.WriteLine("
List of values...SortedList");       IList col = list.GetValueList();       foreach(string res in col) {          Console.WriteLine(res);       }       Console.WriteLine("
SortedList is read-only? = "+list.IsReadOnly);    } }

Output

This will produce the following output −

SortedList elements...
Five Sales
Four Purchase
One IT
Six Finance
Three Marketing
Two  Operations
List of values...SortedList
Sales
Purchase
IT
Finance
Marketing
Operations
SortedList is read-only? = False

Example

Let us see another example −

 Live Demo

using System;
using System.Collections;
public class Demo {
   public static void Main(String[] args) {
      SortedList list = new SortedList();
      list.Add("One", "Finance");
      list.Add("Two", "Marketing");
      list.Add("Three", "Sales");
      list.Add("Four", "Purchase");
      list.Add("Five", "Operations");
      list.Add("Six", "IT");
      Console.WriteLine("SortedList elements...");
      foreach(DictionaryEntry d in list) {
         Console.WriteLine(d.Key + " " + d.Value);
      }
      Console.WriteLine("
Index at key One = "+list.IndexOfKey("One"));       ICollection col = list.Keys;       Console.WriteLine("
Collection of Keys...");       foreach(string res in col)          Console.WriteLine(res);       Console.WriteLine("
SortedList is read-only? = "+list.IsReadOnly);    } }

Output

This will produce the following output −

SortedList elements...
Five Operations
Four Purchase
One Finance
Six IT
Three Sales
Two Marketing
Index at key One = 2
Collection of Keys...
Five
Four
One
Six
Three
Two
SortedList is read-only? = False

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