求解这两道题

1、Spot the mistakes in C# or write the following in C++ .Also take care of memory leaks. Just highlight and state the mistakes within the space provided.

Private static string m_dsn = “data source = xxx, 1433; Network Library=dbmsscon; Initial Catalog=xx; Password=xxx”;

Public static sqlconnection Getconnection () {
Sqlconnection conn = new Sqlconnection (m_dsn):
conn.open ();
Return conn;
}

Public static count records () {
Try
{
Din count =0;
Sqlconnection myconnection = Getconnection ();
Sqlcommand mySQL=new Sqlcommand (“Select * from visitor where groupID=” *grpid* “;”, myconnection);
Sqldatareader mReader= mySQL.ExecuteReader ();
While { mReader.Read () }
count=count + 1;

Return count;
}
}

把这个语句:
Select * from visitor where groupID=" *grpid* "
改成
Select count(0) from visitor where groupID=" *grpid* "

2. There

求解？？ 求解~~~~~ 求解................. 求解~~~~~~~~ 求解,!!!!! 求解~~~~~~~~~~~~!!!!!!!!!!!!!!!!!!!!!! 求解!!!!!!!!!!!???????? 求解！~~ 求解!!!!! 求解!!!!!!!!!!