Legacy Modernization
Case Study 3
Case Study: Legacy Modernization Services - Migrating .NET Framework Backend to .NET Core

Company Background

Sasaran Technologies partnered with a prominent player in the US healthcare market, specializing in large-scale enterprise systems. The client sought to modernize their legacy software by migrating the .NET Framework 4.7 backend to the more versatile .NET Core 3.2.


Manufacturer of pharmaceutical devices

Technology Adopted


Challenges Faced

The migration presented several challenges, including recreating system functionality while preserving the existing structure, selecting suitable substitutes for missing .NET Framework libraries, and implementing evolving features while adapting to changing business needs.

Our Approach

Sasaran Technologies tackled these challenges through a comprehensive approach:
  1. Functionality Preservation: We retained parts of the original system’s structure while rewriting specific components to ensure seamless functionality post-migration.
  2. Library Substitution: Our team manually selected and integrated appropriate libraries and controls to replace the missing .NET Framework components.
  3. Adaptive Development: We flexibly incorporated new functionalities on the fly to accommodate evolving business requirements throughout the modernization process.


  1. Enhanced Application: The migration yielded an improved application, offering enhanced opportunities for users.
  2. Cross-Platform Compatibility: The migration to .NET Core allowed the application to operate smoothly on Mac, Linux, and Windows systems, increasing its accessibility and user reach.
  3. Faster Feature Implementation: The adoption of .NET Core and new standard libraries enabled the client’s development team to implement crucial features more swiftly across multiple environments.
  4. Future-Proofing: By migrating to a more flexible and updated framework, the client’s system is better positioned for future growth and technological advancements.