using System;

public class Program

{

    /* Function to print first smallest  

     and second smallest elements */

    static void print2Smallest(int []arr) 

    { 

        int first, second, arr_size = arr.Length; 

        /* There should be atleast two elements */

        if (arr_size < 2) 

        { 

            Console.Write(" Invalid Input "); 

            return; 

        } 

        first = second = int.MaxValue; 

        for (int i = 0; i < arr_size ; i ++) 

        { 

            /* If current element is smaller than first 

            then update both first and second */

            if (arr[i] < first) 

            { 

                second = first; 

                first = arr[i]; 

            } 

            /* If arr[i] is in between first and second 

            then update second */

            else if (arr[i] < second && arr[i] != first) 

                second = arr[i]; 

        } 

        if (second == int.MaxValue) 

            Console.Write("There is no second" + 

                            "smallest element"); 

        else

            Console.Write("The smallest element is " + 

                            first + " and second Smallest" + 

                            " element is " + second); 

    } 

    /* Driver program to test above functions */

    public static void Main() 

    { 

        int []arr = {10,4,7,3,34}; 

        print2Smallest(arr); 

    }  

​

​

​

}