Program Konversi Suhu

Langsung saja..
Berikut program konversi suhu celcius, fahrenheit dan kelvin

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 Suhu_Pertemuan_Pa_Friska {     public partial class Form1 : Form     {         public Form1()         {             InitializeComponent();         }         private void btnclear_Click(object sender, EventArgs e)         {             txtcelcius.Clear();             txtfahrenheit.Clear();             txtkelvin.Clear();         }         private void txtcelcius_TextChanged(object sender, EventArgs e)         {             if (txtcelcius.Text != "")             {                 double x, f, k;                 x = Convert.ToDouble(txtcelcius.Text);                 f = (x * 9 / 5) + 32;                 k = x + 237;                 txtfahrenheit.Text = f.ToString();                 txtkelvin.Text = k.ToString();             }         }     } }