v1.1.0 - Major IBAN Implementation & Bank Data Expansion

What's Changed

Major Features

• Complete IBAN Implementation: Added full IBAN generation and validation support with proper modulus-97 check digit calculation according to ISO 13616
• New Account Type Support: Added BankAccountNumberType2D for modern digital banks with modulus-11 validation
• Massive Bank Database Expansion: Significantly expanded bank definitions with comprehensive sorting code ranges and BIC/SWIFT codes

IBAN Infrastructure

• Enhanced Format Support: IBAN format now properly handles all Swedish bank account types
• Robust Validation: Fixed IBAN generation for 5-digit sorting codes and edge cases
• Modulus-97 Algorithm: Implemented complete IBAN check digit validation according to international standards

Bank Data Updates

• Added support for numerous additional Swedish banks and their sorting code ranges
• Enhanced bank lookup functionality with improved range handling
• Updated BIC/SWIFT code mappings for international compatibility

Bug Fixes

• Fixed account validation for Type2D accounts (Avanza Bank and others)
• Corrected IBAN generation edge cases for complex sorting code patterns
• Improved modulus validation accuracy across all account types

Technical Improvements

• Refactored range handling for better performance and maintainability
• Enhanced code quality with stricter validation rules
• Updated test coverage for new IBAN functionality

Note: This release contains significant internal changes for IBAN handling that were previously incorrect. All IBAN-related functionality has been completely rewritten for accuracy and compliance.

Full Changelog: v1.0.0...v1.1.0

v1.0.0

Major Release - Breaking Changes

First major release introducing improved API for accessing bank information.

Breaking Changes

Bank Property Type Change: The Bank property on BankAccountNumber changed from string to Bank object. Use .Bank.Name to access bank name instead of .Bank.

New Features

• Enhanced bank information access through Bank object
• Direct access to BIC/SWIFT codes via .Bank.Bic
• Access to sorting code ranges and account type information

Migration

Replace account.Bank with account.Bank.Name when upgrading from v0.x.x.

Technical Details

• All validation logic unchanged
• All formatting options preserved
• No performance impact
• .NET Standard 2.0 compatibility maintained

v0.2.1

What's New in v0.2.1

Features

• BIC/SWIFT Support: Added BIC/SWIFT codes for major Swedish banks including Swedbank, Nordea, SEB, Handelsbanken, Danske Bank, Avanza, ICA Banken, Länsförsäkringar, SBAB, Skandiabanken, and more
• New Banks Added:
  • Aion Bank
  • Lunar Bank
  • Northmill Bank

Improvements

• Build Quality: Enabled TreatWarningsAsErrors to ensure higher code quality
• Null Safety: Fixed null reference warnings in ToString formatting method

v0.2.0

New Features

Multiple ToString Formats

Added comprehensive formatting support for BankAccountNumber with 6 different output formats:

• NUMERIC (N) - Default format: 9071-4172383
• COMPACT (C) - No separators: 90714172383
• SORTINGCODE (S) - Only clearing number: 9071
• ACCOUNTNUMBER (A) - Only account number: 4172383
• IBAN (I) - Swedish IBAN format: SE8790714172383000000
• PRETTY (P) - With bank name: Multitude Bank 9071-4172383

IBAN Generation

• Full IBAN support according to ISO 13616 standard
• Modulus 97 check digit calculation for Swedish bank accounts
• New Modulus97 class for IBAN validation

Enhanced API

var account = BankAccountNumber.Parse("9071-4172383");
Console.WriteLine(account.ToString("IBAN")); // SE8790714172383000000
Console.WriteLine(account.ToString("PRETTY")); // Multitude Bank 9071-4172383

Improvements

- Case-insensitive formatting - All format strings work with any case
- Robust error handling - Invalid formats throw FormatException with helpful messages
- Backward compatibility - Existing ToString() behavior unchanged
- Comprehensive testing - 40+ new tests covering all formats and edge cases

Documentation

- Updated README with formatting examples
- Enhanced CLAUDE.md with architecture details
- Complete API documentation for all formats

Technical Updates

- Updated GitHub Actions to support .NET 9
- All 228 tests passing
- Maintains .NET Standard 2.0 compatibility

v0.1.4

Fix of invalid type for "Marginalen Bank"

v0.1.3

• Fixed check for 15 characters max length of BankAccounts
• Unit tests

v0.1.2

Supports for .NET Standard 2.0

v0.1.1

Merge pull request #4 from jellyhive/v0.1.1

V0.1.1