Char.ToUpper Method (Char)
Converts the value of a Unicode character to its uppercase equivalent.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- c
- Type: System.Char
The Unicode character to convert.
Return Value
Type: System.CharThe 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 CallersAs 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.
The following example converts each character in an array to its uppercase equivalent.
using System; public class Example { public static void Main() { char[] chars = { 'e', 'E', '6', ',', 'ж', 'ä' }; foreach (var ch in chars) Console.WriteLine("{0} --> {1} {2}", ch, Char.ToUpper(ch), ch == Char.ToUpper(ch) ? "(Same Character)" : "" ); } } // The example displays the following output: // e --> E // E --> E (Same Character) // 6 --> 6 (Same Character) // , --> , (Same Character) // ? --> ? // ä --> Ä
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.
