How to join or concatenate two lists in C#?

To concatenate two lists, use AddRange() method.

Set the first list −

var products1 = new List < string > (); products1.Add("Belts"); products1.Add("Tshirt"); products1.Add("Trousers");

Set the second list −

var products2 = new List < string > (); products2.Add("Footwear"); products2.Add("Electronics");

To concatenate both the lists −

products1.AddRange(products2);

The following is the complete code −

Example

 Live Demo

using System.Collections.Generic; using System; namespace Demo {    public static class Program {       public static void Main() {          var products1 = new List < string > ();          products1.Add("Belts");          products1.Add("Tshirt");          products1.Add("Trousers");          Console.WriteLine("Our list1....");          foreach(var p in products1) {             Console.WriteLine(p);          }          var products2 = new List < string > ();          products2.Add("Footwear");          products2.Add("Electronics");          Console.WriteLine("Our list2....");          foreach(var p in products2) {             Console.WriteLine(p);          }          products1.AddRange(products2);          Console.WriteLine("Concatenated list....");          foreach(var p in products1) {             Console.WriteLine(p);          }       }    } }

Output

Our list1.... Belts Tshirt Trousers Our list2.... Footwear Electronics Concatenated list.... Belts Tshirt Trousers Footwear Electronics