SPSiteCollection - Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)).

Si verifica quando proviamo ad eseguire delle istruzioni senza i permessi,
per superare questo problema:

SPSecurity.RunWithElevatedPrivileges(delegate()
{
using (SPSite site = new SPSite(SPContext.Current.Site.Url))
{

site.AllowUnsafeUpdates = true;

//Code .....


site.AllowUnsafeUpdates = false;
}
}

;)