DBHELP Data Processing class

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Threading.Tasks;usingSystem.Data.SqlClient;usingMyshoolmodels;namespacemyshooldal{ Public classDBHelper {stringconn ="Data Source=.;i Nitial Catalog=myschool; User Id=sa";        SqlConnection SC;  PublicSqlConnection sc//Connection {Get {                if(sc==NULL) {SC=NewSqlConnection (conn); }                                returnSC; }                       }         Public voidOpenSc ()//Open {if(SC. State==system.data.connectionstate.broken | | Sc. state==System.Data.ConnectionState.Closed) {sc.                Close (); Sc.            Open (); }        }         Public voidClosesc ()//close {if(SC. State = = System.Data.ConnectionState.Broken | | Sc. state = =System.Data.ConnectionState.Open) {sc.            Close (); }        }         Public intExecuteque (stringSql,sqlparameter[] Paras) {SqlCommand cmd=NewSqlCommand (SQL,SC); Cmd.            Parameters.addrange (paras); intResul =cmd.            ExecuteNonQuery (); returnResul; }    }}

DBHELP Data Processing class