using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Data.SqlClient; using System.Data; namespace EXAMPLE SYSTEM NAME { public class DatabaseAccess { public static SqlConnection conn; private static SqlConnection ConnOpen() { if(conn == null) { conn = new SqlConnection(CONNECTION STRING); } if(conn.State!=System.Data.ConnectionState.Open) { conn.Open(); } return conn; ...
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