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StringComparer.CurrentCultureIgnoreCase Property

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.

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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