public void Cadastrar(Clinica c)
        {
            using (FbConnection Con = new FbConnection(Firebird.StringConexao))
            {
                try
                {
                    Con.Open();

                    string TxtSQL = @"  INSERT
                                        INTO
                                        CLINICACONTRATO
                                        (
                                            CC_CODIGO,
                                            CC_NOME,
                                            CC_STATUS,
                                            CC_TELEFONE
                                        )
                                        VALUES
                                        (
                                            @CC_CODIGO,
                                            @CC_NOME,
                                            @CC_STATUS,
                                            @CC_TELEFONE
                                        )";

                    using (FbCommand cmdInsert = new FbCommand(TxtSQL, Con))
                    {
                        this.Codigo = GerarCodigo();

                        cmdInsert.Parameters.AddWithValue("CC_CODIGO", this.Codigo);
                        cmdInsert.Parameters.AddWithValue("CC_NOME", c.Nome);
                        cmdInsert.Parameters.AddWithValue("CC_STATUS", "A");
                        cmdInsert.Parameters.AddWithValue("CC_TELEFONE", c.Telefone);

                        cmdInsert.ExecuteNonQuery();
                    }
                }
                finally
                {
                    Con.Close();
                }
            }
        }