Using a .NET Framework 3.0 or .NET Framework 3.5 Activity in a .NET Framework 4.5 Workflow
The Interop activity allows you to run a .NET Framework 3.0 Windows Workflow Foundation (WF) activity within a .NET Framework 4.6.1 workflow. This sample demonstrates how to use the Interop activity to pass a string as an argument to a custom WinFX activity.
Using Visual Studio 2012, open the SimpleInterop.sln solution file.
To build the solution, press CTRL+SHIFT+B.
To run the solution, press CTRL+F5.
The samples may already be installed on your machine. Check for the following (default) directory before continuing.
If this directory does not exist, go to Windows Communication Foundation (WCF) and Windows Workflow Foundation (WF) Samples for .NET Framework 4 to download all Windows Communication Foundation (WCF) and WF samples. This sample is located in the following directory.