protected override void Calculate()
{
if (textBox_FromUnit.Text != string.Empty)
{
WeightAndMassConverter weightAndMassConverter = new WeightAndMassConverter(decimal.Parse(textBox_FromUnit.Text), comboBox_FromUnit.Text, comboBox_ToUnit.Text);
textBox_ToUnit.Text = weightAndMassConverter.ConvertUnit().ToString("0.##########");
}
}
