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Using a .NET Framework 3.0 or .NET Framework 3.5 Activity in a .NET Framework 4 Workflow

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This topic applies to Windows Workflow Foundation 4 (WF4).

The Interop activity allows you to run a .NET Framework 3.0 Windows Workflow Foundation (WF) activity within a .NET Framework 4 workflow. This sample demonstrates how to use the Interop activity to pass a string as an argument to a custom .NET Framework 3.0 activity.

To use this sample

  1. Using Visual Studio 2010, open the SimpleInterop.sln solution file.

  2. To build the solution, press CTRL+SHIFT+B.

  3. To run the solution, press CTRL+F5.

Dd807505.Important(en-us,VS.100).gif Note:
The samples may already be installed on your machine. Check for the following (default) directory before continuing.

<InstallDrive>:\WF_WCF_Samples

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.

<InstallDrive>:\WF_WCF_Samples\WF\Basic\Migration\SimpleInterop