How to isolate the regional settings in c#

My product (I'm using Microsoft.Office开发者_运维知识库.Interop.Excel) is targeted to a Portuguese audience where the comma is the decimal symbol. It have a lot of float and double calculations and percentage too. So, when I run the program on a Windows with regional settings set to United States the program runs well, when I run the program on a Windows with regional settings set to Brazil, a lot of wrong things happen, like percentage goes crazy (a lot of zeros and other numbers), some calculations result in a infinite result and more...

My question is, how can I isolate the regional settings in C# solution? Like put a fix regional settings in USA even if the Windows is configured with Brazil? Is this possible? If not, we have other way to fix that?

Thanks in advance.

Lincoln

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Have you tried playing around with the System.Globalization.CultureInfo class? Specifically, CultureInfo.CurrentCulture?