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DBNull.System.IConvertible.ToType Method

This method supports the .NET Framework infrastructure and is not intended to be used directly from your code.

Converts the current DBNull object to the specified type.

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

Object IConvertible.ToType (
	Type type,
	IFormatProvider provider
J# supports the use of explicit interface implementations, but not the declaration of new ones.
JScript supports the use of explicit interface implementations, but not the declarations of new ones.



The type to convert the current DBNull object to.


An object that implements the IFormatProvider interface and is used to augment the conversion. If a null reference (Nothing in Visual Basic) is specified, format information is obtained from the current culture.

Return Value

The boxed equivalent of the current DBNull object, if that conversion is supported; otherwise, an exception is thrown and no value is returned.
Exception typeCondition


This conversion is not supported for the DBNull type.


type is a null reference (Nothing in Visual Basic).

Three conversions are supported: If the type parameter specifies Object or DBNull, the return value is the current DBNull object itself. If the type parameter specifies String, the return value is the string returned by the ToString method.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0
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