How to extract number with dot from textbox?

Question

C++ / C#

Good evening!
Such problem:
from textbox'a value is taken out and written down in a variable.
double x = double.Parse(TextBox1.Text);
But as soon as I enter the number
0.5 into the textbox, everything crashes with an error.
How do I still extract numbers of this type?

Answer 1

Either just:
Or difficult :

double = double.Parse(TextBox1.Text, CultureInfo.GetCultureInfo("ru-RU").NumberFormat);

Answer 2

Better something like this:
If you simply replace the dot with a comma, it will not work for those who have a dot set in the OS.