Uninstall Method

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
public void Uninstall (
	IDictionary savedState
public function Uninstall (
	savedState : IDictionary
Not applicable.



An IDictionary that contains the state of the computer after the installation was complete.

Exception typeCondition


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" );

// Override 'Uninstall' method of Installer class.
public void Uninstall(IDictionary mySavedState)
    if (mySavedState.Equals(null)) {
        Console.WriteLine("Uninstallation Error !");
    else {
        Console.WriteLine("The Uninstall method of 'MyInstallerSample'"
            +" has been called");
} //Uninstall

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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