public partial class frmMain : Form
\{
    private TransactionScopeOption transactionScopeOption;
    private TransactionOptions transactionOptions;

    public frmMain\(\)
    \{
        InitializeComponent\(\);

        transactionScopeOption = TransactionScopeOption\.Required;
        transactionOptions = new TransactionOptions\(\)
            \{
                IsolationLevel = IsolationLevel\.ReadUncommitted,
                Timeout = TimeSpan\.FromMinutes\(2\)
            \};
    \}

    private void btnTestFb\_Click\(object sender, System\.EventArgs e\)
    \{
        FbConnection connection = new FbConnection\(ConfigurationManager\.ConnectionStrings\["ConnectionStringFb"\]\.ConnectionString\);

        try
        \{
            using \(TransactionScope scope = new TransactionScope\(transactionScopeOption, transactionOptions\)\)
            \{
                connection\.Open\(\);

                NestedInserts\(connection\);

                scope\.Complete\(\);
            \}

            connection\.Close\(\);

            MessageBox\.Show\("Done\."\);
        \}
        catch \(Exception ex\)
        \{
            MessageBox\.Show\(ex\.Message\);
        \}
    \}

    private void ExecuteNonQuery\(FbConnection connection, string commandText\)
    \{
        using \(FbCommand command = new FbCommand\(commandText, connection\)\)
        \{
            command\.ExecuteNonQuery\(\);
        \}
    \}

    private void NestedInserts\(FbConnection connection\)
    \{
        using \(TransactionScope scope = new TransactionScope\(transactionScopeOption, transactionOptions\)\)
        \{
            InsertA\(connection\);

            scope\.Complete\(\);
        \}
    \}

    private void InsertA\(FbConnection connection\)
    \{
        using \(TransactionScope scope = new TransactionScope\(transactionScopeOption, transactionOptions\)\)
        \{
            ExecuteNonQuery\(connection, "INSERT INTO TABLE\_A \(DESCRIPTION\) VALUES \('A'\)"\);

            InsertB\(connection\);

            scope\.Complete\(\);
        \}
    \}

    private void InsertB\(FbConnection connection\)
    \{
        using \(TransactionScope scope = new TransactionScope\(transactionScopeOption, transactionOptions\)\)
        \{
            ExecuteNonQuery\(connection, "INSERT INTO TABLE\_B \(DESCRIPTION\) VALUES \('B'\)"\);

            InsertC\(connection\);

            scope\.Complete\(\);
        \}
    \}

    private void InsertC\(FbConnection connection\)
    \{
        using \(TransactionScope scope = new TransactionScope\(transactionScopeOption, transactionOptions\)\)
        \{
            ExecuteNonQuery\(connection, "INSERT INTO TABLE\_C \(DESCRIPTION\) VALUES \('C'\)"\);

            InsertD\(connection\);

            scope\.Complete\(\);
        \}
    \}

    private void InsertD\(FbConnection connection\)
    \{
        using \(TransactionScope scope = new TransactionScope\(\)\)
        \{
            throw new Exception\("Fb exception thrown\!"\);

            scope\.Complete\(\);
        \}
    \}