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DefaultCharSetAttribute Class

Specifies the value of the CharSet enumeration. This class cannot be inherited.

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

public final class DefaultCharSetAttribute extends Attribute

Apply the DefaultCharSetAttribute attribute at the assembly level or module level to set the CharSet value for any call to DllImportAttribute that does not include a CharSet named argument specified by the user.

A CharSet named argument specified by the user overrides the setting of DefaultCharSetAttribute.


Only the C# and Visual Basic compilers recognize this attribute; it is not used by the C++ compiler.

The following code example changes the default CharSet value from Ansi to Auto.

using System.Runtime.InteropServices;

[module: DefaultCharSet(CharSet.Auto)]

// …


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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

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