Workflow Dehydrate / Security Validation issues / Persistance

http://www.sharepoint-tips.com/2007/09/security-validation-for-this-page-is.html

http://ddkonline.blogspot.com/2009/06/sharepoint-2007-workflow-workflow.html

Guid siteID = workflowProperties.Site.ID;
Guid webID = workflowProperties.Web.ID;

using (site = new SPSite(siteID))
{
using (web = site.OpenWeb(webID))
{
//write wf code within this.
}
}