更改线程文化 .NET Framework 4.6 及更高版本

Question

I'm trying to change a new thread CultureInfo like the sample below but:

• Attempt1: SetCulture1() is not changing my thread

• Attempt2: SetCulture2() I got the exception "System.InvalidOperationException: instance is read-only" (when set CurrencyDecimalSeparator)

   static void Main(string[] args) { Thread th = new Thread(thread_test); // nothing happens SetCulture1(th); // exception System.InvalidOperationException: instance is read-only SetCulture2(th); th.Start(); } public static void SetCulture1(System.Threading.Thread thread) { var ci = new System.Globalization.CultureInfo("pt-BR"); ci.NumberFormat.CurrencyDecimalSeparator = "."; thread.CurrentCulture = ci; // <-- after this culture info not change if (thread.CurrentCulture.NumberFormat.CurrencyDecimalSeparator != ".") { Console.WriteLine("Nothing happened"); Console.ReadKey(); } } public static void SetCulture2(System.Threading.Thread thread) { thread.CurrentCulture = new System.Globalization.CultureInfo("pt-BR"); thread.CurrentCulture.NumberFormat.CurrencyDecimalSeparator = "."; // <-- exception throws here } static void thread_test() { Console.WriteLine("Culture: {0}", CultureInfo.CurrentCulture.DisplayName); }

I notice that before .net 4.6 this sample works. Did something changed in 4.6?

Thank you!

Answer 1

While this odd situation has no answer ( Microsoft bug report ), I found a work around setting DefaultThreadCurrentCulture at the start of my code (Main method):

        var ci = new System.Globalization.CultureInfo(System.Globalization.CultureInfo.CurrentCulture.LCID);
        ci.NumberFormat.CurrencyDecimalSeparator = ".";
        ci.NumberFormat.CurrencyGroupSeparator = ",";
        ci.NumberFormat.NumberDecimalSeparator = ".";
        ci.NumberFormat.NumberGroupSeparator = ",";
        ci.NumberFormat.PercentDecimalSeparator = ".";
        ci.NumberFormat.PercentGroupSeparator = ",";
        System.Globalization.CultureInfo.DefaultThreadCurrentCulture = ci;
        System.Globalization.CultureInfo.DefaultThreadCurrentUICulture = ci;