Sorry mate. My bad. I almost forgot that I had removed the project from my solution and the dll file because I wanted to test another thing. That should be solved then however, I have another issue.
Having the project added to my solution and adding the references I have an error when building as follow:
Error 1 The type or namespace name 'PropertyDataAncestorProvider' could not be found (are you missing a using directive or an assembly reference?) C:\Users\Aboozar\Projects\Testings\Composite C1 Test2\C1WorkflowDemo\DataTypes\IProduct.cs
19 34 C1WorkflowDemo
Any idea what am I missing?