/// <include file='doc\EventLogInstaller.uex' path='docs/doc[@for="EventLogInstaller.Rollback"]/*' />
/// <devdoc>
/// Called when this or another component in the installation has failed.
/// </devdoc>
public override void Rollback(IDictionary savedState)
{
base.Rollback(savedState);
Context.LogMessage(Res.GetString(Res.RestoringEventLog, Source));
if (savedState["baseInstalledAndPlatformOK"] != null)
{
bool logExists = (bool)savedState["logExists"];
if (!logExists)
{
EventLog.Delete(Log, ".");
}
else
{
bool alreadyRegistered;
object alreadyRegisteredObj = savedState["alreadyRegistered"];
if (alreadyRegisteredObj == null)
{
alreadyRegistered = false;
}
else
{
alreadyRegistered = (bool)alreadyRegisteredObj;
}
if (!alreadyRegistered)
{
// delete the source we installed, assuming it succeeded. Then put back whatever used to be there.
if (EventLog.SourceExists(Source, "."))
{
EventLog.DeleteEventSource(Source, ".");
}
}
}
}
}