输出行将数字添加到用户输入上（Windows窗体）

Question

自从我在输出中添加文本以来，它一直在向中添加数字inputTemperature。例如，如果用户输入“ 10 ”，则输出行将显示：“ -112摄氏度转换为...”，并且转换将是正确的。您对导致这种情况的发生有任何想法吗？

// VARIABLES

double inputTemperature;  // Stores user input

double celsius;  // Celsius value

double fahrenheit;  // Farhenheit value

// INPUT

if (double.TryParse(txtTemperature.Text, out inputTemperature) == false)  // Checking that user input is valid

{

    MessageBox.Show("ERROR: Please enter a numeric temperature to convert.");  // Error message that is displayed

    txtTemperature.ResetText();  // Resets the form

    txtTemperature.Focus();  // Places the user's cursor back in the Temperature textbox

}

// PROCESSING

if (optCelsius.Checked)  // If the celsius button is clicked, then the temperature needs to be converted from fahrenheit

{

    fahrenheit = double.Parse(txtTemperature.Text);

    fahrenheit = ((fahrenheit - 32) * 5 / 9);

    lblNewTemperature.Text = fahrenheit.ToString(inputTemperature + " degrees Celsius converts to " + fahrenheit + " degrees Fahrenheit.");

}

else if (optFahrenheit.Checked)  // If the fahrenheit button is clicked, then the temperature needs to be converted from celsius

{

    celsius = double.Parse(txtTemperature.Text);

    celsius = ((celsius * 9) / 5 + 32);

    lblNewTemperature.Text = celsius.ToString(inputTemperature + " degrees Fahrenheit converts to " + celsius + " degrees Celsius.");

}