Casting

namespace WindowsFormsApp15
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        float floattal = 5.8f;
        double doubletal = 8.9;
        int inttal = 7;

        private void btnKnap_Click(object sender, EventArgs e)
        {
            int resultat1 = (int) floattal + (int) doubletal;
            int resultat2 = (int)(floattal + doubletal);

            lbl1.Text = resultat1.ToString();
            lbl2.Text = resultat2.ToString();
        }
    }
}