Reach control panel's features on the pc with c#

[dnur]

Hi, I try to reach Start->Control Panel->Regional and Language Options->Customize->Decimal Symbol and change of that value from windows forms app written in c#. I search different solution from this :

System.Globalization.CultureInfo ci = System.Threading.Thread.CurrentThread.CurrentCulture;
string decimalSeparator = ci.NumberFormat.CurrencyDecimalSeparator;

because these System.Globalization or culture things can't see if the user change just that value manually on his/her computer.How can I handle this problem, please help..

[abelLazm]

because these System.Globalization or culture things can't see if the user change just that value manually on his/her computer.How can I handle this problem, please help.. can you explain these two lines?

[abelLazm]

have you checked this link :http://msdn.microsoft.com/en-us/library/system.globalization.cultureinfo.numberformat.aspx

[abelLazm]

and this link :http://msdn.microsoft.com/en-us/library/system.globalization.cultureinfo.aspx:

[dnur]

I examined that links detaily. But I couldn't use it.
System never let to change

ci.NumberFormat.CurrencyDecimalSeparator

value.
I create clone culture but, I couldn't replace with the current culture

have you checked this link :http://msdn.microsoft.com/en-us/library/system.globalization.cultureinfo.numberformat.aspx