public string GetKelvinToFahren(float val)
 {
     return(string.Format("{0} K são {1} ºF", val, ConvertTemperature.KelvinToFahren(val)));
 }
 public void ValidKelvinToFahren()
 {
     Assert.Equal(212f, ConvertTemperature.KelvinToFahren(373f));
 }