Windows Forms

An exception occurred during the Rollback phase of the CalculatorWindowsServiceAppl.ProjectInstaller installer.
System.ArgumentException: The savedState dictionary does not contain the expected values and might have been corrupted.
An exception occurred during the Rollback phase of the installation. This exception will be ignored and the rollback will 
continue. However, the machine might not fully revert to its initial state after the rollback is complete.

protected override void OnBeforeInstall(IDictionary savedState)
{
            serviceInstaller1.ServiceName = "CalculatorWindowsService";

            base.OnBeforeInstall(savedState);

            String username = GetContextParameter("username");
            String password = GetContextParameter("password");
            String account = GetContextParameter("account");

            //String username = @"talx/c-aaleem";
            //String password = "mohammadathotmail";

            if (!String.IsNullOrEmpty(username))
                serviceProcessInstaller1.Username = username;
            if (!String.IsNullOrEmpty(password))
                serviceProcessInstaller1.Password = password;
            
            serviceProcessInstaller1.Context.LogMessage("Any Thing");
}