If this parameter is set to true, the SalesforceConnection actually does not connect to Salesforce when you open a connection. It works with local data cache until you query data that is not cached or modify data. For more details, see Cache Overview.
A side effect of this may cause the following situation: if your connection string parameters are incorrect, but the data cache is present (for example, when your SecurityToken expires or a password to Salesforce account is changed), you won't get any connection errors when working with a connection till you work only with cached data. Only when you try to query data that is not cached or modify data, you will get the corresponding connection error.
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2