c# how can I read String of double correctly despite the number Format?

is there a way that make c# automatically recognised the "Culture" of the pc where is installed so that it can read the number correctly?

That's what it's doing by default - and why you're having a problem, because the culture used to created of the value you're parsing ("2.3658") isn't the culture on your local machine.

For any particular value, you should really know which culture produced it. For machine-to-machine communication, it's best to use the invariant culture (CultureInfo.Invariant) which is mostly similar to the US. Ideally, you shouldn't store values in a culture-specific format at all; either store them in a binary representation instead of a string, or if you must store a string, treat that as effectively machine-to-machine communication.

If you're in the unfortunate position of receiving data where you know it's been formatted according to some human culture, but you don't know which one, you should probably use some heuristics to detect what the culture is. That can easily fail though - for example, is "1,234" meant to be a 1 followed by a "grouping" separator, followed by 234 - meaning one thousand, two hundred and thirty-four... or is it meant to be a 1 followed by a decimal separator, making the value just a bit more than 1? Both interpretations are valid, depending on the culture you use...