Input string was not in a correct format in double.Parse

Question

I am new to C#. I\'m trying to make a calculator, but the following error occurred:

Input string was not in a correct format.

T

Answer 1

Also remember that the Parse method is relying on the culture of your operating system to perform the conversion, so try to change your code to

num2 = double.Parse(textBox1.Text, CultureInfo.InvariantCulture);

You might also consider to use the

double.TryParse

method for better exception handling.