ArgumentNullException Class

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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

Public Class ArgumentNullException _
    Inherits ArgumentException
public class ArgumentNullException : 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(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.)
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 frames on the call stack at the time the current exception was thrown. (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 the Object 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.)
GetType Gets the runtime type of the current instance. (Inherited from Exception.)
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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Remarks

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

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

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Platforms

Windows Phone

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.

See Also

Reference

System Namespace

Exception