Zip

using System;
 
//добавить ссылку
using System.Linq;
 
class Program {
 public static int Main() {
 
 
  int[] ara1 = new int[] { 1, 2, 3, 4, 5};
  string[] ara2 = new string[] { "one", "two", "three", "four", "five" };
 
  var query = ara1.Zip(ara2, (a, b) => a + " " + b);
 
  foreach(var i in query) {
   Console.WriteLine("{0} ", i);
  }
 
  Console.ReadKey();
  return 0;
 }
}