Migrate a SharePoint workflow from Visual Studio 2008 to Visual Studio 2010

This is a useful article when converting a custom workflow project from Visual Studio 2008 to Visual Studio 2010: http://blogs.msdn.com/b/bethmassi/archive/2010/01/15/migrating-a-2007-workflow-to-visual-studio-sharepoint-2010.aspx In a nutshell, Go ahead with the conversion wizard Add a new Project (2010 Sequential Workflow Project) to the solution Rename the Workflow1  folder to the new name - Very Important, you have to keep this folder in order for the workflow to be in the feature, so just rename it. Copy the old workflow.cs file to the new folder in the new project. This will bring over the designer file and rules file (if applicable). Delete the worflow1.cs and update the class name to the new class name Copy over all other files that are not related to packaging such as Utility classes. Copy default namespaces to new project. Check your default namespaces, namespaces in Elements.xml, assembly versions Update namespace in new project on the .cs file, and .designer.cs file. [...]