does else think silverlight 4 security bit screwball? look @ following scenario: silverlight when set trusted app, , run out of browser mode allows browse file using file open dialog. you require name of path of file open com automation. example (excel/word) anything. it impossible full path of file dialog because of security restrictions you can using com filesystemobject - ever want users file system, including create folders, move , delete files. so in other words, why fuss security in silverlight, hinders real business use cases, when possible access file anyways using com? to way, if user runs malicious silverlight app, unlikely they'll - oh com @ fault. com afterall being called silverlight app. here mean.... user browses file - c:\myfile.xls silverlight prevents getting path (for security reasons) silverlight lets work documents using com can ever want file system in background anyways. including copying file documents, if knew name! besides can wipe...