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Char.ToUpper Method (Char, CultureInfo)

Converts the value of a specified Unicode character to its uppercase equivalent using specified culture-specific formatting information.

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

public static char ToUpper (
	char c,
	CultureInfo culture
public static char ToUpper (
	char c, 
	CultureInfo culture
public static function ToUpper (
	c : char, 
	culture : CultureInfo
) : char
Not applicable.



A Unicode character.


A System.Globalization.CultureInfo object that supplies culture-specific casing rules, or a null reference (Nothing in Visual Basic).

Return Value

The uppercase equivalent of c, modified according to culture, or the unchanged value of c, if c is already uppercase or not alphabetic.

Exception typeCondition


culture is a null reference (Nothing in Visual Basic).

Use String.ToUpper to convert a string to uppercase.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0