title: Conversion Between Fahrenheit and Celsius ISSUE
body: <p>i have this problem from a beginning c sharp book
  this for conversion between Fahrenheit and Celsius. </p>
  
  <pre><code>    private void button1_Click(object sender, EventArgs e)
  {
      float fahr, cel;
      if (Celsius.Checked == true)
      {
          fahr = float.Parse(textBox1.Text);
          cel = (5/9)*(fahr-32);
          richTextBox1.Text = "The Degree in Celsius is:" + cel.ToString() + Environment.NewLine + "cool isn't it!?";
      }
      else if (Fahrenheit.Checked == true )
      {
          cel = float.Parse(textBox1.Text);
          fahr = ((9 * cel)/5)+ 32;
          richTextBox1.Text = "The degree in Fahrenheit is:" + fahr.ToString() + Environment.NewLine + "cool is it!?";
      }
  </code></pre>
  
  <p>when i want to get Celsius from a Fahrenheit it keeps giving me 0 even though the formula appears to be true to me.
  what's wrong here?<br>
  because i think the problem lies here:</p>
  
  <pre><code>        if (Celsius.Checked == true)
      {
          fahr = float.Parse(textBox1.Text);
          cel = (5/9)*(fahr-32);
          richTextBox1.Text = "The Degree in Celsius is:" + cel.ToString() + Environment.NewLine + "cool isn't it!?";
  </code></pre>
  
  <p>maybe i have something wrong with Order of Ops but i think it's True? 
  thanks for help.</p>