【導讀】usingSystem;(Enteryourname:);stringstrName=();(Hi+strName);usingSystem;using;FileStreamfs=newFileStream(@c:\temp\,,);StreamReadersr=newStreamReader(fs);Stringline=();while(line!=null). (line);line=();usingSystem;using;FileStreamfs=newFileStream(@c:\temp\,,StreamWritersw=newStreamWriter(fs);(0,);(FirstLine);(SecondLine);usingSystem;using;(c:\\temp\\,C:\\temp\\);usingSystem;using;(c:\\temp\\,C:\\temp\\);usingSystem;using;Timertimer=newTimer();=1000;=true;while(()!='q'). (\r{0},);usingSystem;using;using;stringstrDSN=Provider=;DataSource=c:\\;stringstrSQL=SELECT*FROMemployees;OleDbCommandcmd=newOleDbCommand(strSQL,conn);reader=();(FirstName:{0},LastName:{1},reader[FirstName],reader[LastName]);usingSystem;using;SqlConnectionconn=newSqlConnection(DataSource=localhost;IntegratedSecurity=SSPI;InitialCatalog=pubs);SqlCommandcmd=newSqlCommand(SELECT*FROMemployees,conn);(FirstName:{0},LastName:{1},(0),(1));(ExceptionOccured-->>{0},e);usingSystem;using;using;using;using;StringstrFileName=c:/temp/;SqlConnectionconn=newSqlConnection(server=localhost;uid=sa;pwd=;database=db);=newSqlCommand(strSql,conn);DataSetds=newDataSet();(ds,employees);FileStreamfs=newFileStream(strFileName,,);(fs);usingSystem;using;using;stringstrDSN=Provider=;DataSource=c:\;stringstrSQL=INSERTINTOEmployee(FirstName,LastName)VALUES('FirstName',