[ASP.NET] DB Connecties blijven open staan.

protected HtmlForm Form1;

private void RecordCount() {
    string cmdText = "SELECT COUNT(*) AS C FROM Customers";
    string connString = "server=(local);User ID=sa;Pwd=;database=Northwind";

    using ( SqlConnection conn = new SqlConnection(connString) ) {
        conn.Open();
        SqlCommand cmd = new SqlCommand(cmdText, conn);
        int me = (int)cmd.ExecuteScalar(); 
    }
    // using ends so conn.Dispose is called and connection is closed.
}

private void Page_Load(object sender, System.EventArgs e) {
    int connCounter = 0; // counts the succesfully opened connections
    bool error = false; // indicates if there is an error during opening
    string errorMessage = ""; // the possible error message

    // Count how many times we can Open a connection
    while ( error == false && connCounter < 1000 ) {
        try  {
            RecordCount();
            connCounter++;
        } catch ( Exception ex ) {
            // save error message and break from while
            errorMessage = ex.Message;
            error = true;
        }
    }

    // Show the result on the Clients browser
    Label myLabel = new Label();
    if ( error ) {
        myLabel.Text = "Error while opening connection " +
            (connCounter+1).ToString() + 
            ".<br>" + errorMessage;

    }
    else {
        myLabel.Text = "Successfully opened a 1000 connections.";
    }

    this.Form1.Controls.Add( myLabel );
}

private void RecordCount() {
    string cmdText = "SELECT COUNT(*) AS C FROM Customers";
    string connString = "server=(local);User ID=sa;Pwd=;database=Northwind";

    SqlConnection conn = new SqlConnection(connString); // ) {
    conn.Open();
    try {
        SqlCommand cmd = new SqlCommand(cmdText, conn);
        int me = (int)cmd.ExecuteScalar(); 
    }
    finally {
        conn.Close();
    }
}