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TextInfo::ToUpper Method (Char)

Converts the specified character to uppercase.

Namespace:  System.Globalization
Assemblies:   System.Globalization (in System.Globalization.dll)
  mscorlib (in mscorlib.dll)

virtual wchar_t ToUpper(
	wchar_t c


Type: System::Char

The character to convert to uppercase.

Return Value

Type: System::Char
The specified character converted to uppercase.

Casing semantics depend on the culture in use. For the invariant culture, the casing semantics are not culture-sensitive. For a specific culture, the casing semantics are sensitive to that culture.

If a security decision depends on a string comparison or a case-change operation, the application should use the InvariantCulture to ensure that the behavior is consistent regardless of the culture settings of the system. However, the invariant culture must be used only by processes that require culture-independent results, such as system services. Otherwise, it produces results that might be linguistically incorrect or culturally inappropriate.

For more information on cultures, see CultureInfo.

The following code example changes the casing of a string based on the English (United States) culture, with the culture name en-US.

using namespace System;
using namespace System::Globalization;
int main()

   // Defines the String* with mixed casing.
   String^ myString = "wAr aNd pEaCe";

   // Creates a TextInfo based on the S"en-US" culture.
   CultureInfo^ MyCI = gcnew CultureInfo( "en-US",false );
   TextInfo^ myTI = MyCI->TextInfo;

   // Changes a String* to lowercase.
   Console::WriteLine( "\"{0}\" to lowercase: {1}", myString, myTI->ToLower( myString ) );

   // Changes a String* to uppercase.
   Console::WriteLine( "\"{0}\" to uppercase: {1}", myString, myTI->ToUpper( myString ) );

   // Changes a String* to titlecase.
   Console::WriteLine( "\"{0}\" to titlecase: {1}", myString, myTI->ToTitleCase( myString ) );

This code produces the following output.

S"wAr aNd pEaCe" to lowercase: war and peace
S"wAr aNd pEaCe" to uppercase: WAR AND PEACE
S"wAr aNd pEaCe" to titlecase: War And Peace


.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.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

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

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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