.NET Framework 4 features improvements to WCF designed to streamline the way that customers/developers host and interact with workflows. Most importantly, Microsoft has labored to boost the performance of WF-based workflows, in addition to other changes. WCF enhancements in .NET Framework 4 are synonymous with the advent of new features including service discovery, routing service, REST support, but also diagnostics capabilities, and a performance boost.
The .NET Framework is an integral Windows component that supports building and running the next generation of applications and Web services. The key components of the .NET Framework are the common language runtime (CLR) and the .NET Framework class library, which includes ADO.NET, ASP.NET, Windows Forms, and Windows Presentation Foundation (WPF). The .NET Framework provides a managed execution environment, simplified development and deployment, and integration with a wide variety of programming languages, Microsoft states.
As far as the Windows Workflow is concerned, Microsoft is offering: Application (Samples) - provides samples that are related to workflow applications. Basic - provides samples that demonstrate basic Windows Workflow Foundation (WF) functionality. Scenario - provides examples of Windows Workflow Foundation (WF) scenarios, according to the Redmond company.
WCF and WF samples can be downloaded here
Microsoft Visual Studio 2010 Premium Release Candidate (RC) is available for download here
Visual Studio 2010 Professional Release Candidate (RC) is available for download here
Visual Studio 2010 Ultimate Release Candidate (RC) is available for download here
.NET Framework 4 Release Candidate (RC) is available for download here
Silverlight 4 Release Candidate (RC) Build 4.0.50303.0 is available for download here
Along with the release of microsoft Visual Studio 2010 and .NET Framework 4, Microsoft is making available Windows Communication Foundation (WCF) and WF Samples for .NET Framework 4.