Add-Member - Powershell 2.0 CmdLet

Microsoft Windows PowerShell is a command-line shell and scripting tool based on the Microsoft .NET Framework. It is designed for system administrators, engineers and developers to control and automate the administration of Windows and applications.

More than hundred command-line tools (so called "cmdlets") can be used to perform system administration tasks and Windows Management Instrumentation (WMI). These cmdlets are easy to use, with standard naming conventions and common parameters, and standard tools for piping, sorting, filtering, and formatting data and objects.

Add-Member

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Short description
Adds a user-defined custom member to an instance of a Windows PowerShell object.

Syntax
Add-Member [-MemberType] {AliasProperty | CodeProperty | Property | NoteProperty | ScriptProperty | Properties | Pr
    opertySet | Method | CodeMethod | ScriptMethod | Methods | ParameterizedProperty | MemberSet | Event | All} [-Name]
     <string> -InputObject <psobject> [[-Value] <Object>] [[-SecondValue] <Object>] [-Force] [-PassThru] [<CommonParame
    ters>]

Description
The Add-Member cmdlet adds a user-defined custom member to an instance of a Windows PowerShell object. It lets you add the following types of members: AliasProperty, CodeProperty, NoteProperty, ScriptProperty, PropertySet, CodeMet hod, MemberSet, and ScriptMethod. You set the initial value of the member by using the Value parameter. In the case of AliasProperty, ScriptProperty, CodeProperty, and CodeMethod, you can supply additional information by using the SecondValue parameter.
    
The additional members are added to the particular instance of the object that you pipe to Add-Member or specify using the InputObject parameter. The additional member is available only while that instance exists. You can use the 
Export-Clixml cmdlet to save the instance, including the additional members, to a file. The information stored in that file can be used by the Import-Clixml cmdlet to re-create the instance of the object.