Execute SQL query script

Static voidMain (string[] args) {Console.WriteLine ("Enter user number:"); stringCusernum =Console.ReadLine (); Console.WriteLine ("Enter user name:"); stringCusername =Console.ReadLine (); stringConnString =@"Data source=.; Initial catalog=lh0216; User id=sa;pwd=founder123"; //The Objconnection class is automatically released with the using parentheses            using(SqlConnection objconnection =NewSqlConnection (connstring))                               {Objconnection.open (); using(SqlCommand objcmd =Objconnection.createcommand ()) {objCmd.CommandText="SELECT * from Tbzg where czgbh= '"+ Cusernum +"'" ; using(SqlDataReader objreader =Objcmd.executereader ()) {                        //The result set is not empty                        if(Objreader.read ()) {stringCvalue = objreader.getstring (Objreader.getordinal ("CZGXM")); //Check that manually entered names are the same as the names of queries in the database                            if(Cvalue = =cusername) {Console.WriteLine ("Hello {0}", Cusername); }                        }                        Else{Console.WriteLine ("The user name does not exist. ");        }}}} Console.readkey (); }