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ArgumentException Class

The exception that is thrown when one of the arguments provided to a method is not valid.

For a list of all members of this type, see ArgumentException Members.


[Visual Basic]
Public Class ArgumentException
   Inherits SystemException
public class ArgumentException : SystemException
public __gc class ArgumentException : public SystemException
class ArgumentException extends SystemException

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.


ArgumentException is thrown when a method is invoked and at least one of the passed arguments does not meet the parameter specification of the called method. All instances of ArgumentException should carry a meaningful error message describing the invalid argument, as well as the expected range of values for the argument.

The primary derived classes of ArgumentException are ArgumentNullException and ArgumentOutOfRangeException. These derived classes should be used instead of ArgumentException, except in situations where neither of the derived classes is acceptable. For example, exceptions should be thrown by:

  • ArgumentNullException whenever a null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.
  • ArgumentOutOfRangeException when the value of an argument is outside the range of acceptable values; for example, when the value "46" is passed as the month argument during the creation of a DateTime.

If the method call does not have any argument or if the failure does not involve the arguments themselves, then InvalidOperationException should be used.

ArgumentException uses the HRESULT COR_E_ARGUMENT, which has the value 0x80070057.

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


Namespace: System

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework

Assembly: Mscorlib (in Mscorlib.dll)

See Also

ArgumentException Members | System Namespace | Exception | Handling and Throwing Exceptions