Find second smallest from the given collection

SecondSmallest.cs

using System;

class KthSmallest {
  int[] A;
  public KthSmallest() {
  }

  // representation should be taken, process input
  public void TakeInput() {
    A = Array.ConvertAll(Console.ReadLine().Split(), int.Parse);
  }

  public int GetSecondSmallest() {
    int first = int.MaxValue;
    int second = first;

    for (int i = 0; i < A.Length; i++)
      if (first > A[i]) {
        second = first;
        first = A[i];
      }
      else if (second > A[i])
        second = A[i];
    return second;
  }
}

public class Solution {
  public static void Main() {
    KthSmallest demo = new KthSmallest();
    demo.TakeInput();
    Console.WriteLine("Second smallest is: " + demo.GetSecondSmallest());
  }
}