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C# program to find Intersection of two lists
To find intersection of two lists in C#, use the Intersect() method.
The following is our list 1.
List<int> list1 = new List<int>(); list1.Add(2); list1.Add(3); list1.Add(5); list1.Add(7);
The following is our list 2.
List<int> list2 = new List<int>(); list2.Add(5); list2.Add(4); list2.Add(6); list2.Add(8);
The following is the code to find the intersection of two lists in C#.
Example
using System; using System.Collections.Generic; using System.Linq; using System.Text.RegularExpressions; namespace Demo { public class Program { public static void Main(String[] args) { List<int> list1 = new List<int>(); list1.Add(2); list1.Add(3); list1.Add(5); list1.Add(7); Console.WriteLine(list1.Count); List<int> list2 = new List<int>(); list2.Add(5); list2.Add(4); list2.Add(6); list2.Add(8); Console.WriteLine(list2.Count); List<int> common = list1.Intersect(list2).ToList(); Console.WriteLine(common.Count); } } }
Output
4 4 1
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