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CharSet Enumeration

Dictates which character set marshaled strings should use.

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

[SerializableAttribute]
[ComVisibleAttribute(true)]
public enum CharSet

Member nameDescription
NoneThis value is obsolete and has the same behavior as CharSet.Ansi.
AnsiMarshal strings as multiple-byte character strings.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkUnicodeMarshal strings as Unicode 2-byte characters.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkAutoAutomatically marshal strings appropriately for the target operating system. The default is Unicode on Windows NT, Windows 2000, Windows XP, and the Windows Server 2003 family; the default is Ansi on Windows 98 and Windows Me. Although the common language runtime default is Auto, languages may override this default. For example, by default C# marks all methods and types as Ansi.

Because there are several unmanaged string types and only one managed string type, you must use a character set to specify how managed strings should be marshaled to unmanaged code. This enumeration, which provides character set options, is used by DllImportAttribute and StructLayoutAttribute. For a detailed description of the string marshaling and name matching behavior associated with this enumeration, see Specifying a Character Set.

The following code example shows how to specify a CharSet enumeration value when applying the StructLayoutAttribute to a managed definition.

[ StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
 public struct MyPerson 
 {
    public String first; 
    public String last;
 }

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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