Generate xml method based on database

Sqlconnection Conn =   New Sqlconnection ();
Conn. connectionstring =   " Server = 127.0.0.1; user id = sa; Password = fdahgdrethj31313210212121; database = northwind; persist Security info = true " ;
Conn. open ();
Sqldataadapter da =   New Sqldataadapter ( " Select * from table " , Conn );
Sqlcommandbuilder thisbulder =   New Sqlcommandbuilder (DA );
Dataset DS =   New Dataset ();
Da. Fill (DS );
DS. writexml ( @" C: \ Temp. xml " );
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Private   Void Writexmltofile (Dataset thisdataset) {
If (Thisdataset =   Null ) {Return;}
// Create a file name to write.
String Filename =   " Myxmldoc. xml " ;
// Create the filestream to write.
System. Io. filestream myfilestream =   New System. Io. filestream
(Filename, system. Io. filemode. Create );
// Create an xmltextwriter with the filestream.
System. xml. xmltextwriter myxmlwriter =  
New System. xml. xmltextwriter (myfilestream, system. Text. encoding. Unicode );
// Write to the file with the writexml method.
Thisdataset. writexml (myxmlwriter );
Myxmlwriter. Close ();
}