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Char.ToUpper Method (Char)

Converts the value of a Unicode character to its uppercase equivalent.

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

public static char ToUpper(
	char c
)

Parameters

c
Type: System.Char
The Unicode character to convert.

Return Value

Type: System.Char
The uppercase equivalent of c, or the unchanged value of c if c is already uppercase, has no uppercase equivalent, or is not alphabetic.

Casing rules are obtained from the current culture.

Use String.ToUpper to convert a string to uppercase.

Notes to Callers

As explained in Best Practices for Using Strings in the .NET Framework, we recommend that you avoid calling character-casing and string-casing methods that substitute default values. Instead, you should call methods that require parameters to be explicitly specified. To convert a character to uppercase by using the casing conventions of the current culture, call the ToUpper(Char, CultureInfo) method overload with a value of CultureInfo.CurrentCulture for its culture parameter.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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