Difference Between Sand Box Solution and Farm Solution
Sand Box Solution Farm Solution sand box solution deploy in content dbase farm solution deployed in file system ( hiv \template\layout) sand box doesn't support to system.IO Therefore you Cannot read/write to the file system. farm solution support to system.IO Therefore you Can read/write to the file system. sand box solution support to deploy as site collection level farm solution is used to deploy a s farm level Visual web parts are not supported Visual web parts are supported No SP Security - Therefore no Elevated Privileges No support for SPUtility.SendEmail, So you can't Send Mails using this class. No Server side redirects, such as Response.Redirect, Server.Transfer, SPUtility.Redirect. Here you can use SP Security Here you...