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StringComparer.CurrentCultureIgnoreCase Property

Updated: May 2010

Gets a StringComparer object that performs case-insensitive string comparisons using the word comparison rules of the current culture.

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

public static StringComparer CurrentCultureIgnoreCase { get; }

Property Value

Type: System.StringComparer
A new StringComparer object.

The current culture is the CultureInfo object associated with the current thread.

The StringComparer returned by the CurrentCultureIgnoreCase property can be used when strings are linguistically relevant but their case is not. For example, if strings are displayed to the user but case is unimportant, culture-sensitive, case-insensitive string comparison should be used to order the string data.

The CurrentCultureIgnoreCase property actually returns an instance of an anonymous class derived from the StringComparer class.

Each call to the CurrentCultureIgnoreCase property get accessor returns a new StringComparer object, as the following code shows.

private void CompareCurrentCultureInsensitiveStringComparer()
{
   StringComparer stringComparer1, stringComparer2;
   stringComparer1 = StringComparer.CurrentCultureIgnoreCase;
   stringComparer2 = StringComparer.CurrentCultureIgnoreCase;
   // Displays false
   Console.WriteLine(StringComparer.ReferenceEquals(stringComparer1, 
                                                    stringComparer2));
}

To improve performance, you can store the StringComparer object in a local variable rather than retrieve the value of the CurrentCultureIgnoreCase property multiple times.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

Date

History

Reason

May 2010

Added usage guidelines.

Customer feedback.

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