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How to check whether a List contains a specified element in C#
To check whether a List contains a specified element, the code is as follows −
Example
using System; using System.Collections.Generic; public class Demo { public static void Main(String[] args){ List<string> list1 = new List<string>(); list1.Add("One"); list1.Add("Two"); list1.Add("Three"); list1.Add("Four"); list1.Add("Five"); Console.WriteLine("Elements in List1..."); foreach (string res in list1){ Console.WriteLine(res); } List<string> list2 = new List<string>(); list2.Add("India"); list2.Add("US"); list2.Add("UK"); list2.Add("Canada"); list2.Add("Poland"); list2.Add("Netherlands"); Console.WriteLine("Elements in List2..."); List<string>.Enumerator demoEnum = list2.GetEnumerator(); while (demoEnum.MoveNext()) { string res = demoEnum.Current; Console.WriteLine(res); } Console.WriteLine("Is List2 equal to List1? = "+list2.Equals(list1)); Console.Write("Does List2 has element Canada? = "+list2.Contains("Canada")); } }
Output
This will produce the following output −
Elements in List1... One Two Three Four Five Elements in List2... India US UK Canada Poland Netherlands Is List2 equal to List1? = False Does List2 has element Canada? = True
Example
Let us now see another example −
using System; using System.Collections.Generic; public class Demo { public static void Main(String[] args){ List<int> list = new List<int>(); list.Add(100); list.Add(200); list.Add(300); list.Add(400); list.Add(500); list.Add(600); list.Add(700); list.Add(800); list.Add(900); list.Add(1000); Console.WriteLine("Elements in List..."); foreach (int res in list){ Console.WriteLine(res); } Console.Write("Does List has element 150? = "+list.Contains(150)); } }
Output
This will produce the following output −
Elements in List... 100 200 300 400 500 600 700 800 900 1000 Does List has element 150? = False
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