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Installer.Uninstall Method

When overridden in a derived class, removes an installation.

Namespace:  System.Configuration.Install
Assembly:  System.Configuration.Install (in System.Configuration.Install.dll)

public virtual void Uninstall(
	IDictionary savedState


Type: System.Collections.IDictionary
An IDictionary that contains the state of the computer after the installation was complete.


The saved-state IDictionary might have been corrupted.


An exception occurred while uninstalling. This exception is ignored and the uninstall continues. However, the application might not be fully uninstalled after the uninstallation completes.

Notes to Inheritors
  • If you override the Install method in a derived class, be sure to call the base class's Install method first in your derived method. The Install method calls the Install method of each installer contained in the Installers property of this instance. After the contained installers run, this method updates the IDictionary object (specified through the stateSaver parameter) to reflect the status of the installation. The IDictionary should be empty when passed to the Install method. If all the Install methods succeed, the Commit method is called. Otherwise, the Rollback method is called.

  • If you need to add installer instances to the Installers collection in the Install method, be sure to perform the same additions to the collection in the Uninstall method. However, you can avoid maintaining the collection in both methods if you add installer instances to the Installers collection in the class constructor for your custom installer.

The following example demonstrates the Uninstall method of Installer. The Uninstall method is overridden in the derived class of Installer.

// Override 'Uninstall' method of Installer class.
public override void Uninstall( IDictionary mySavedState )
   if (mySavedState == null)
      Console.WriteLine("Uninstallation Error !");
      base.Uninstall( mySavedState );
      Console.WriteLine( "The Uninstall method of 'MyInstallerSample' has been called" );

.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

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.