想要求助大神给我讲讲这段程序的意思

public class getSqlConnection
    {
        #region   代码中用到的变量
        string G_Str_ConnectionString = @"Data Source=(local);Initial Catalog=db_CSManage;Integrated Security=True";//连接数据库
        SqlConnection G_Con;  //声明链接对象
        #endregion
连接数据库以后，在下面这段代码中是如何实现引用的，求解释
 public static int intReturn = 0;
        tb_Company Company = new tb_Company();
        tb_CompanyMenthod CompanyMenthod = new tb_CompanyMenthod();
        tb_JhGoodsInfoMenthod jhgood = new tb_JhGoodsInfoMenthod();
        public static int intFalg =0;
        private void ControlStatus()