HigherLower game keeps giving "Proficiat"

 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace HogerLager
{
  public partial class frmHogerLager : Form
  {
    int raadGetal;
    int turn = 0;
    public frmHogerLager()
    {
      InitializeComponent();

    }

    private void frmHogerLager_Load(object sender, EventArgs e)
    {
      newGame();
    }
    private void newGame()
    {
      Random rnd = new Random();
      raadGetal = rnd.Next(1, 100);
      lblBoodschap.Text = "Begin";
      turn = 0;
      label1.Text = Convert.ToString(turn);
    }
    private void btnEvalueer_Click(object sender, EventArgs e)
    {
      // Methode om te zien of de input een geldige integer is.
      bool isNumeric;
      isNumeric = int.TryParse(txtInput.Text, out raadGetal);
      if (isNumeric)
      {// Is een getal!
        turn++;
        checkTurn();
        int input = Convert.ToInt32(txtInput.Text);
        if (raadGetal > input)
        { lblBoodschap.Text = ("Hoger"); }
        else if (raadGetal < input)
        { lblBoodschap.Text = ("Lager"); }
        else if (raadGetal == input)
        {
          lblBoodschap.Text = "Proficiat!";
        }
        else
        { lblBoodschap.Text = "Err"; }
      }
      else
      {
        MessageBox.Show("Voer een geldige integer in");
      }
    }
    private void checkTurn()
    {
      if (turn == 10)
      {
        MessageBox.Show("Game OVer!");
        newGame();
      }
      else {
        label1.Text = Convert.ToString(turn);
      }
    }

    private void btnNieuwSpel_Click(object sender, EventArgs e)
    {
      newGame();
    }

    private void btnStop_Click(object sender, EventArgs e)
    {
      this.Close();
    }
  }
}