CSHARP

c# array.join

using System;
public class Demo {
   public static void Main(string[] args) {
      string[] strArr = {"AB", "BC", "CD", "DE", "EF", "FG", "GH", "IJ" };
      Console.WriteLine("String Array...");
      foreach(string s in strArr) {
         Console.WriteLine(s);
      }
      string str = string.Join("*", strArr);
      Console.WriteLine("Result (after joining) = " + str);
   }
}

join string c#

public static string Join(string separator, params obj[] array)
{
  //
}
object[] array = {"Hello", "Geeks", 12345, 786};
string s1 = string.Join(", ", array);

C# String.Join

List<string> names = new List<string>() { "John", "Anna", "Monica" };
var result = String.Join(", ", names.ToArray());