using System;

using System.Collections.Generic;

​

//program to separate array in unique and duplicate

​

//input:

//Array1 = {"collection", "sample", "dual", "map"}

//Array2 = {"sample","value"}

​

//output:

//Duplicate = {"sample"}

//Unique = {"collection", "dual", "map", "value"}

​

public class Program

{

    public static void Main()

    {

        String[] array1 =new String[] {"collection", "sample", "dual", "map"};

        String[] array2= new String[] {"sample","value"};

        Dictionary<string , int> dict= new Dictionary<string,int>();

        // add 2 array in new array and then loop or compare one after another

        for(int i=0; i<array1.Length;i++)

        {

           if(!dict.ContainsKey(array1[i]))

           {

               dict.Add(array1[i],1);

           }

            else

            {

              dict[array1[i]]++;

            }

        }

        for(int j=0; j<array2.Length;j++)

        {

           if(!dict.ContainsKey(array1[j]))

           {

               dict.Add(array1[j],1);

           }

            else

            {

              dict[array1[j]]++;

            }

        }

        // Compare 

        List<string> duplicate= new List<string>();

        List<string> unique= new List<string>();

        string val= string.Empty;

        foreach(var a in dict)

        {

            val=a.Key;

           if(a.Value > 1)

           {               

               duplicate.Add(val);

           }

            else

            {

                unique.Add(val);

            }

        }

        // Print Both the list

        foreach(var a in unique)

        {

         Console.Write("Unique = "+ a + " ");

        }

        foreach(var b in duplicate)

        {

        Console.Write("Duplicate ="+ b +" ");

        }

        Console.ReadLine();

    }

}