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Moving WCF services to Azure using CoreWCF

In today's rapidly evolving technology landscape, businesses are constantly seeking ways to modernize their applications and infrastructure. One such transformational journey involves migrating on-premises WCF services written in the .NET Framework to .NET.

Why migrate to Azure?

This evolution not only facilitates the upgrade of existing services but also empowers businesses with the flexibility to host them across diverse platforms and technologies. Among these, Microsoft Azure stands out through its scalability, reliability, and robust set of services. This article explores the significance of migrating to Azure and introduces CoreWCF, a powerful solution that can streamline this migration process, providing a more modern and flexible alternative to hosting WCF services on Azure App Service with ASP.NET 4.8.

Before we dive into the specifics of how CoreWCF can aid in migrating WCF services to Azure, it’s essential to understand why this migration matters. Many businesses have relied on WCF services for years to power their applications and systems. These services, often hosted on on-premise servers, may have become integral to their operations. However, migrating to Azure can unlock numerous benefits:

  1. Cost Savings: Azure’s pay-as-you-go model allows you to pay only for the resources you use, eliminating the need for large upfront investments in hardware and infrastructure. This can result in significant cost savings compared to maintaining on-premise infrastructure.
  2. Scalability: Azure provides the ability to scale resources up or down based on demand, ensuring that your services can handle increased workloads without major architectural changes.
  3. Security and Compliance: Azure provides robust security measures and compliance certifications, addressing the concerns of businesses that handle sensitive data subject to stringent regulations. Further security is also gained through the use of .NET instead of .NET Framework.
  4. Global Reach: Azure’s global data center presence allows businesses to extend their reach and provide services to a broader audience.

The CoreWCF Solution

CoreWCF is an open-source, cross-platform implementation of the WCF framework that is part of the .NET Foundation. It brings the power of WCF to .NET, and since CoreWCF targets .NET Standard 2.0 this also works with the newly released .NET 8. But why choose CoreWCF Over Azure App Service with ASP.NET 4.8?

  1. Minimal impact: CoreWCF is designed to be compatible with your existing WCF applications. This means you can reuse your current code, service contracts, and configurations with minimal modifications, easing the migration process.
  2. Cross-Platform Compatibility: CoreWCF’s ability to run on various platforms, including Linux and Docker containers, aligns perfectly with Azure’s multi-platform environment. This flexibility empowers you to host your services in Azure Kubernetes Service (AKS) or Azure Container Apps (ACA).
  3. .NET 6: Since CoreWCF is compatible with .NET, you have access to the latest .NET features and improvements.
  4. Active Community: CoreWCF benefits from an active open-source community that ensures ongoing support, updates, and bug fixes.
  5. Lightweight and Modern: CoreWCF is a lightweight, modern framework designed for .NET Core and .NET 6, offering improved performance and a smaller footprint compared to ASP.NET 4.8.

There are of course some things to consider before replying on CoreWCF as your overall savior. It’s an Open-Source project, and even though it’s being supported by the .NET Foundation and over 70 contributors, does not offer any commercial support. All the options and configurations that you use in WCF projects might not yet be implemented. However, it’s great to see that the project is being actively maintained and the community has some say in the roadmap.


Migrating on-premise WCF services to Azure is a strategic move for enterprises seeking increased flexibility, scalability, and cost-efficiency. CoreWCF, with its compatibility and cross-platform support, simplifies this transition. By embracing CoreWCF and Azure, businesses can harness the full potential of the cloud while preserving their existing service investments. It’s a journey well worth taking in today’s digital landscape.

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