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NotImplementedException Class

.NET Framework 2.0

The exception that is thrown when a requested method or operation is not implemented.

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

C#
C++
VB
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[SerializableAttribute] 
[ComVisibleAttribute(true)] 
public class NotImplementedException : SystemException
J#
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/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public class NotImplementedException extends SystemException
JScript
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SerializableAttribute 
ComVisibleAttribute(true) 
public class NotImplementedException extends SystemException

NotImplementedException uses the default Equals implementation, which supports reference equality. For a list of initial values for an instance of NotImplementedException, see the NotImplementedException constructors.

System.Object
   System.Exception
     System.SystemException
      System.NotImplementedException
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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
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Annotations FAQ
Prefer throwing NotSupportedException over NotImplementException
NotImplementedException should only be thrown when a member has not been implemented, but will be throughout the course of a product cycle. Throwing one indicates that implementation of a member has not been completed, if you want to throw an exception to indicate that a member is not supported, throw NotSupportedException.
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