A comprehensive .NET 8.0 helper library providing production-ready utilities for enterprise applications. Coject.Core.Helper streamlines common development tasks with robust implementations for file management, email services, data processing, security, and cloud integration. Key Features: - File Management: Multi-provider support (AWS S3, FTP, Local) with upload, download, and file signature validation - Email Services: Full-featured SMTP integration using MailKit with template support and signature generation - Security: Data encryption, JWT token handling, and barcode generation with ZXing - Data Utilities: JSON processing, date/time helpers, string manipulation, and image handling - Cloud Integration: Seamless AWS S3 operations with configurable storage solutions - API Integration: Helper classes for external service communication Perfect for applications requiring reliable file storage, secure email delivery, data encryption, and cloud service integration. Built with extensibility and performance in mind, this library reduces boilerplate code and accelerates development cycles. Dependencies include MailKit, MimeKit, AWSSDK.S3, System.IdentityModel.Tokens.Jwt, and ZXing.Net.Mobile for comprehensive functionality.