Reading a double value from a string

Question

I've tried to solve this for hours and absolutely don't understand what the compiler is doing here. I have strings that basically look like this:

"KL10124 Traitor #2 - +XX-+0.25 - More Stuff"

and need to read off the double '0.25' programmatically. Calling the string above s, the following two lines don't work:

string[] h = s.Split('-');
string h2 = h[2].Substring(1,h[2].Length - 2);
double d = Convert.ToDouble(h2);

The output if I display d is "25". I thought it might depend on the '.' resp ',' culture dependency, but if I insert

double d = Convert.ToDouble(h2.Replace('.',','));

it does not change a thing, the output is still "25".

But finally, if I do the brute force method as below I get the verbatim output "0,25" on the screen

double d;
string[] h = s.Split('-');
string h2 = h[2].Substring(1,h[2].Length - 2);
if (h2.Contains("."))
{
    string[] h3 = h2.Split('.');
    d = Convert.ToDouble(h3[0]) + Convert.ToDouble(h3[1])/100;
}
else
{
    d = Convert.ToDouble(h2);
}
return d;

Why exactly do the first two versions not work? The last bit of code cannot be the correct way to do this.

Answer 1

Try to use

double d = Convert.ToDouble(h2, CultureInfo.InvariantCulture);

instead of

double d = Convert.ToDouble(h2);