Windows Dev Center

The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

CultureInfo::InvariantCulture Property


Gets the CultureInfo object that is culture-independent (invariant).

Namespace:   System.Globalization
Assembly:  mscorlib (in mscorlib.dll)

property CultureInfo^ InvariantCulture {
	static CultureInfo^ get();

Property Value

Type: System.Globalization::CultureInfo^

The object that is culture-independent (invariant).

The invariant culture is culture-insensitive; it is associated with the English language but not with any country/region. You specify the invariant culture by name by using an empty string ("") in the call to a CultureInfo instantiation method. CultureInfo::InvariantCulture also retrieves an instance of the invariant culture. It can be used in almost any method in the System.Globalization namespace that requires a culture. The objects returned by properties such as CompareInfo, DateTimeFormat, and NumberFormat also reflect the string comparison and formatting conventions of the invariant culture.

Unlike culture-sensitive data, which is subject to change by user customization or by updates to the .NET Framework or the operating system, invariant culture data is stable over time and across installed cultures and cannot be customized by users. This makes the invariant culture particularly useful for operations that require culture-independent results, such as formatting and parsing operations that persist formatted data, or sorting and ordering operations that require that data be displayed in a fixed order regardless of culture.

You can use the invariant culture for culture-sensitive string operations that are not affected by the conventions of the current thread culture and that are consistent across cultures. For example, you may want sorted data to appear in a fixed order or apply a standard set of casing conventions to strings regardless of the current thread culture. To do this, you pass the InvariantCulture object to a method that has a CultureInfo parameter, such as Compare(String^, String^, Boolean, CultureInfo^) and ToUpper(CultureInfo^).

The InvariantCulture property can be used to persist data in a culture-independent format. This provides a known format that does not change and that can be used to serialize and deserialize data across cultures. After the data is deserialized, it can be formatted appropriately based on the cultural conventions of the current user.

For example, if you choose to persist date and time data in string form, you can pass the InvariantCulture object to the DateTime::ToString(String^, IFormatProvider^) or DateTimeOffset::ToString(IFormatProvider^) method to create the string, and you can pass the InvariantCulture object to the DateTime::Parse(String^, IFormatProvider^) or DateTimeOffset::Parse(String^, IFormatProvider^, DateTimeStyles) method to convert the string back to a date and time value. This technique ensures that the underlying date and time values do not change when the data is read or written by users from different cultures.

The following example uses the invariant culture to persist a DateTime value as a string. It then parses the string and displays its value by using the formatting conventions of the French (France) and German (Germany) cultures.

No code example is currently available or this language may not be supported.

If you are making a security decision (such as whether to allow access to a system resource) based on the result of a string comparison or a case change, you should not use the invariant culture. Instead, you should perform a case-sensitive or case-insensitive ordinal comparison by calling a method that includes a StringComparison parameter and supplying either StringComparison::Ordinal or StringComparison::OrdinalIgnoreCase as an argument. Code that performs culture-sensitive string operations can cause security vulnerabilities if the current culture is changed or if the culture on the computer that is running the code differs from the culture that is used to test the code. In contrast, an ordinal comparison depends solely on the binary value of the compared characters.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Return to top
© 2015 Microsoft