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Check if ArrayList is Synchronized (thread safe) in C#
To check if ArrayList is synchronized, the code is as follows −
Example
using System; using System.Collections; public class Demo {    public static void Main(String[] args) {       ArrayList list1 = new ArrayList();       list1.Add("A");       list1.Add("B");       list1.Add("C");       list1.Add("D");       list1.Add("E");       list1.Add("F");       list1.Add("G");       list1.Add("H");       list1.Add("I");       Console.WriteLine("Elements in ArrayList1...");       foreach (string res in list1) {          Console.WriteLine(res);       }       ArrayList list2 = new ArrayList();       list2.Add("A");       list2.Add("B");       list2.Add("C");       list2.Add("D");       list2.Add("E");       list2.Add("F");       list2.Add("G");       list2.Add("H");       list2.Add("I");       Console.WriteLine("Elements in ArrayList2...");       foreach (string res in list2) {          Console.WriteLine(res);       }       Console.WriteLine("Is ArrayList synchronized? = "+list2.IsSynchronized);    } }  Output
This will produce the following output −
Elements in ArrayList1... A B C D E F G H I Elements in ArrayList2... A B C D E F G H I Is ArrayList synchronized? = False
Example
Let us see another example −
using System; using System.Collections; public class Demo {    public static void Main(String[] args) {       ArrayList list1 = new ArrayList();       list1.Add("One");       list1.Add("Two");       list1.Add("Three");       list1.Add("Four");       list1.Add("Five");       Console.WriteLine("Elements in ArrayList...");       foreach (string res in list1) {          Console.WriteLine(res);       }       ArrayList list = ArrayList.Synchronized(list1);       Console.WriteLine("Is ArrayList synchronized? = "+list.IsSynchronized);    } }  Output
This will produce the following output −
Elements in ArrayList... One Two Three Four Five Is ArrayList synchronized? = True
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