Concat

using System;//from j a  va 2s.c  o  m
using System.Collections;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        int[] seq1 = { 1, 2, 3 };
        int[] seq2 = { 3, 4, 5 };

        IEnumerable<int> concat = seq1.Concat(seq2);

        foreach(int i in concat){
            Console.WriteLine(i);
        }
    }
}

using System;//from   j  a v  a 2 s . com
using System.Linq;


public class MainClass{

   public static void Main(string[] args){   
         String[] First = { "One", "Two", "Three" };
         String[] Second = { "Four", "Five", "Six" };

         var ThisQuery = First.Concat<String>(Second);

         foreach (String ThisElement in ThisQuery)
            Console.WriteLine(ThisElement);


   }
}

using System;//from   j  av  a 2  s.  c  o m
using System.Collections.Generic;
using System.Linq;
public class MainClass {
    public static void Main() {

        int[] seq1 = { 1, 2, 3 };
        int[] seq2 = { 3, 4, 5 };
        IEnumerable<int> concat = seq1.Concat(seq2);    //  { 1, 2, 3, 3, 4, 5 }
        IEnumerable<int> union = seq1.Union(seq2);     //  { 1, 2, 3, 4, 5 }
    }
}

using System;/* j  a v  a  2s. co m*/
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class MainClass {
    public static void Main() {
        string[] presidents = {"ant", "arding", "arrison", "eyes", "over", "java2s.com"};
        IEnumerable<string> items = presidents.Take(5).Concat(presidents.Skip(5));

        foreach (string item in items)
            Console.WriteLine(item);
    }
}