摘要:SharePoint 2010 Security：Application Pool Identities V.S. SHAREPOINT\SYSTEM Account
在SharePoint 2010中，對外透過Application Pool Identities存取外部資源，對內透過SHAREPOINT\SYSTEM Account存取資源，因此，若想要擴大使用者存取內部資源的權限，可以透過
SPSecurity.RunWithElevatedPrivileges(delegate{//Code runs as the SHAREPOINT\SYSTEM user});
另外，可以在web.config檔中設定<identity impersonate="true"/>並且運用下列程式碼以使用者的權限透過application pool存取外部資源：
SPSecurity.RunWithElevatedPrivileges(delegate{
WebRequest xmlReq = WebRequest.CreateDefault(xmlUri);
//Uses the app pool credentials;
xmlReq.Credentials = CredentialCache.DefaultCredentials;
});
參考資料來源：
Inside Microsoft SharePoint 2010
Chapter 12 SharePoint Security
