c# - Get default backup path of sql server prgrammatiacally -

i taking backups of sql server databases programmatically using c#. figured microsoft.sqlserver.management.smo , other libraries made purpose. can backup database. nice. here code :

var server = new server(@"" + instancename); var backuper = new backup(); try {     backuper.action = backupactiontype.database;     backuper.database = dbname;     backuper.devices.adddevice(dbname + ".bak", devicetype.file);     backuper.backupsetname = dbname + " - yedek";     backuper.backupsetdescription = "açık bulut depo - " + dbname + " - yedek";     backuper.expirationdate = datetime.now.addyears(20);     server.connectioncontext.connect();     backuper.sqlbackup(server);  } catch(exception ex){//..} 

my question here how can path of device database backed into? know can specify own path :

backuper.devices.adddevice("c:\somepath\" + dbname + ".bak", devicetype.file); 

then can know is, want default location , path. please me out this.

from blog post, use function below:

http://www.mssqltips.com/sqlservertip/1966/function-to-return-default-sql-server-backup-folder/

create function dbo.fn_sqlserverbackupdir()  returns nvarchar(4000)    begin    declare @path nvarchar(4000)   exec master.dbo.xp_instance_regread          n'hkey_local_machine',          n'software\microsoft\mssqlserver\mssqlserver',n'backupdirectory',          @path output,           'no_output'  return @path  end;