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ArgumentNullException Class

.NET Framework 4

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.

Inheritance Hierarchy

System::Object
  System::Exception
    System::SystemException
      System::ArgumentException
        System::ArgumentNullException

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

Syntax

C++

[SerializableAttribute]
[ComVisibleAttribute(true)]
public ref class ArgumentNullException : public ArgumentException

The ArgumentNullException type exposes the following members.

Constructors

	Name	Description
	ArgumentNullException()	Initializes a new instance of the ArgumentNullException class.
	ArgumentNullException(String)	Initializes a new instance of the ArgumentNullException class with the name of the parameter that causes this exception.
	ArgumentNullException(SerializationInfo, StreamingContext)	Initializes a new instance of the ArgumentNullException class with serialized data.
	ArgumentNullException(String, Exception)	Initializes a new instance of the ArgumentNullException class with a specified error message and the exception that is the cause of this exception.
	ArgumentNullException(String, String)	Initializes an instance of the ArgumentNullException class with a specified error message and the name of the parameter that causes this exception.

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Properties

	Name	Description
	Data	Gets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception.)
	HelpLink	Gets or sets a link to the help file associated with this exception. (Inherited from Exception.)
	HResult	Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception.)
	InnerException	Gets the Exception instance that caused the current exception. (Inherited from Exception.)
	Message	Gets the error message and the parameter name, or only the error message if no parameter name is set. (Inherited from ArgumentException.) In XNA Framework 3.0, this member is inherited from Exception::Message. In Portable Class Library Portable Class Library, this member is inherited from Exception::Message.
	ParamName	Gets the name of the parameter that causes this exception. (Inherited from ArgumentException.)
	Source	Gets or sets the name of the application or the object that causes the error. (Inherited from Exception.)
	StackTrace	Gets a string representation of the immediate frames on the call stack. (Inherited from Exception.)
	TargetSite	Gets the method that throws the current exception. (Inherited from Exception.)

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Methods

	Name	Description
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetBaseException	When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetObjectData	Sets the SerializationInfo object with the parameter name and additional exception information. (Inherited from ArgumentException.)
	GetType	Gets the runtime type of the current instance. (Inherited from Exception.) In XNA Framework 3.0, this member is inherited from Object::GetType(). In Portable Class Library Portable Class Library, this member is inherited from Object::GetType().
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Creates and returns a string representation of the current exception. (Inherited from Exception.)

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Events

	Name	Description
	SerializeObjectState	Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception. (Inherited from Exception.)

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Remarks

ArgumentNullException is thrown when a method is invoked and at least one of the passed arguments is nullptr but should never be nullptr.

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.

Version Information

.NET Framework

Supported in: 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

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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.

Reference

System Namespace

Exception

Other Resources

Handling and Throwing Exceptions

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