Modernizing Legacy C# Applications with Azure & Modern Frontends

Strategically refactor existing C# codebases, moving from older .NET Framework versions to .NET Core or .NET 6+. Identify monolithic components for microservices extraction. Implement API gateways to expose modernized services while maintaining compatibility with legacy systems. Focus on testability and modularity during refactoring.

Address legacy MS SQL Server databases by optimizing schemas, indexing, and stored procedures. Consider migrating to Azure SQL Database for managed services, or Azure Cosmos DB for a NoSQL approach where applicable. Implement data archiving strategies to reduce the load on active databases.

Utilize Azure Virtual Machines for lift-and-shift of legacy applications, or containerize them for Azure App Service or Azure Kubernetes Service (AKS). Implement Azure DevOps for automated CI/CD pipelines to manage the modernization process. Leverage Azure AD for unified identity management across old and new systems.

Develop new user interfaces with Angular that consume existing or newly modernized C# APIs. Angular's structured approach and strong typing (TypeScript) can provide a familiar environment for C# developers. Use Angular's HttpClient module to interact with RESTful services and build modular, maintainable UIs.

Alternatively, use React to build fresh, responsive frontends that connect to your C# backend. React's flexibility allows for incremental adoption, where you can replace parts of a legacy UI with new React components. Leverage React Router for client-side navigation and integrate with existing authentication mechanisms.