Incorrect syntax near '\'

I need to write a program that iterates through a few SQL scripts at a specific path location and executes them. The progress will be incremented on a progress bar, which I still need to do, and the progress will be shown on a TextBox. When running the program I get the following error:

Incorrect syntax near '\'.

The code is as follow:

public void runScripts()
{
    int lc = System.IO.Directory.GetFiles(this.sc, "*.*", System.IO.SearchOption.AllDirectories).Length;
    this.pgbCopyProgress.Maximum = lc;
    DirectoryInfo dir = new DirectoryInfo(this.sc);
    DirectoryInfo[] dirs = dir.GetDirectories();

    if (!dir.Exists)
    {
        throw new DirectoryNotFoundException(
                "Source directory does not exist or could not be found: "
                + this.sc);
    }

    // Get the scripts in the directory and run them
    FileInfo[] files = dir.GetFiles();
    foreach (FileInfo file in files)
    {
        try
        {
            string sqlConnectionString = "Data Source=(local);Initial Catalog=Wiehan_Deployer;Integrated Security=True";
            string f = this.sc;
            f = f + @"\" + file;
            FileInfo fl = new FileInfo(f);
            string scripts = file.OpenText().ReadToEnd();
            SqlConnection con = new SqlConnection(sqlConnectionString);
            con.Open();
            SqlCommand cmd = new SqlCommand();
            cmd.Connection = con;
            cmd.CommandText = fl.ToString();
            cmd.ExecuteNonQuery();
            con.Close();
            txtEvents.Text += "\nScript executed successfully." + f;
            lc = System.IO.Directory.GetFiles(this.sc, "*.*", System.IO.SearchOption.AllDirectories).Length;
            this.pgbCopyProgress.Value = lc;
            this.pgbCopyProgress.Update();
            this.pgbCopyProgress.Refresh();
        }
        catch (Exception ex)
        {
            txtEvents.Text += ex.Message + "\r\n" ;
            txtEvents.Update();
            txtEvents.Refresh();
        }
    }
}