ArgumentNullException Class (System)

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.NET Framework Class Library
ArgumentNullException Class

The exception that is thrown when a null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

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

Syntax
Visual Basic (Declaration)
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public Class ArgumentNullException
	Inherits ArgumentException
Visual Basic (Usage)
Dim instance As ArgumentNullException
C#
[SerializableAttribute] 
[ComVisibleAttribute(true)] 
public class ArgumentNullException : ArgumentException
C++
[SerializableAttribute] 
[ComVisibleAttribute(true)] 
public ref class ArgumentNullException : public ArgumentException
J#
/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public class ArgumentNullException extends ArgumentException
JScript
SerializableAttribute 
ComVisibleAttribute(true) 
public class ArgumentNullException extends ArgumentException
Remarks

ArgumentNullException is thrown when a method is invoked and at least one of the passed arguments is a null reference (Nothing in Visual Basic) but should never be a null reference (Nothing in Visual Basic).

ArgumentNullException behaves identically to ArgumentException. It is provided so that application code can differentiate between exceptions caused by null arguments and exceptions caused by arguments that are not null. For errors caused by arguments that are not null, see ArgumentOutOfRangeException.

ArgumentNullException uses the HRESULT E_POINTER, which has the value 0x80004003.

For a list of initial property values for an instance of ArgumentNullException, see the ArgumentNullException constructors.

Inheritance Hierarchy
System.Object
   System.Exception
     System.SystemException
       System.ArgumentException
        System.ArgumentNullException
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Platforms

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.

Version Information

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0
See Also
Community Content

Drew Noakes
Useful Live Template for Resharper

If you use the VS.NET add-in Resharper, this Live Template will save you a lot of typing:

if ($ARG$==null)
    throw new ArgumentNullException("$ARG$");
$END$

 

Where the macro for $ARG$ is "Suggest variable of System.Object".  I use an abbreviation of 'argn'.