Windows Workflow 4.0 Activities not being added to the toolbox

I've created a class project in VS 2开发者_JS百科010 Beta 2. I've added one Activity to it. Saved it. Created another Activity. I would expect the first Activity to appear in the toolbox so I could drag it into my workflow, but it's not. Any ideas?

I had this problem with Visual Studio 2010 RTM as well. I wrote a blog post with a potential solution here.

Essentially, the toolbox doesn't load your custom activities if you have two projects in your solution that share the same folder.

Make sure your Custom Activity class is marked as public.

I experienced this issue too. My workflow service project was part of a solution with other projects. I removed the workflow service project from the main solution and created a new solution only containing the workflow service project. After a build, the custom activities were generated and listed in the toolbox.

I don't know if this is still relevant for you but I had the same problem.

I could solve it like this:

• Right click on the Toolbox to open context menu.
• Select Choose Items...
• Select the tab System.Activities Components
• Click on browse and select the dll that contains the custom activity
• Make sure that the activity shows in the list and is checked
• Click OK

Not really the same question but in Visual Studio 2012, on a 64 bit windows, I had a 64 bit application with CodeActivity and NativeActivity and they were not showing up in the toolbox. I changed the application to AnyCPU and built it, and the activities are now displayed... I hope it will help someone :)

I resolved this by creating a Windows Workflow 4.0 Console application and then removing out the Program.cs. Very odd, but it worked.