System.Configuration.ConnectionStringSettings.ToString C# (CSharp) Метод

        public override string ToString() {
            return ConnectionString;
        }

    public void GetConnectionString()
    {
        try
        {
            if (rootWebConfig.ConnectionStrings.ConnectionStrings.Count > 0)
            {
                connString = rootWebConfig.ConnectionStrings.ConnectionStrings["Expenses"];
                if (connection == null)
                {
                    connection = new SqlConnection(connString.ToString());

                    Session["Connection"] = connection;
                    //connection.Open();
                }
            }
        }
        catch (Exception e)
        {
            Page.ClientScript.RegisterStartupScript(Page.GetType(),
                                                    "MessageBox", "alert('" + e.Message + "');", true);
        }

        finally
        {
            if (connection != null && connection.State == ConnectionState.Open)
            {
                connection.Close();
            }
        }
    }