$cat_id = $_GET['cat_id'];
            $cat_id = mysqli_real_escape_string($con, $cat_id);
            $query = "SELECT

            if($q = mysqli_query($con, "SELECT * FROM images WHERE `name` = '". preg_replace('/[^.A-Za-z0-9]/ui', '',  $_GET['name'])

 mod.userDell(columns[0], columns[1]);

    if (code.Equals("D"))
                    {
                        //mod.userDell( // HERE ); <--- HERE 
                        mod.userDell(columns[0], columns[1]);
                        Console.WriteLine("");
                    }

    public static void userDell(string msi,String filename, String DB_CONN_STRING)
            {
                String temp_msisdn = "+" + msi;
                bool ima = DatabaseConnection.checkExist(temp_msi);
                bool result;
                if (ima) 
                {
                    result = DatabaseConnection.deleteRoute(temp_msi);

UserMod.UserMod mod = new UserMod.UserMod();

    string[] lines = File.ReadAllLines(@"pathtofile"); 
            foreach (string line in lines)
            {
                string[] columns = line.Split('|');

bool ima = DatabaseConnection.checkExist(temp_msisdn);

WriteLog.writeLog(...)

public static void userDell(string msi,String filename, String DB_CONN_STRING)
        {
            String temp_msisdn = "+" + msi;
            bool ima = DatabaseConnection.checkExist(temp_msi);