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I am using the Designer Rehosting demo from http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnlong/html/WFDsgnRehst.aspBy default, this demo uses SequentialWorkflowActivity as base class to create workflows. Now I have modified it so that workflows will be created from a custom activity which is then derived from SequentialWorkflowActivity.So far, everything goes well except one problem:I create a workflow, add a IfElseActivity, add some conditions to it and finally I save the workflow. The demo generates three files (.xoml, .xoml.cs, .rules) which are good and can be compiled to DLL by the WorkflowCompiler class.However, if I re-open the workflow in the demo, all the conditions saved in the .rules file will be lost.I have done some researches on this, and found out that when the base class of the workflow is a custom activity instead of the SequentialWorkflowActivity, the method GetFileReader of the workflow designer loader will never be called.Can anyone give me some help on this?Thanks.

I think I have found the reason for this problem, not because of PerformLoad.If I compile my base workflow with a .rules file, even if it is empty, the designer will refuse to read conditions from the .rules file of my derived workflow.Now I compile my base workflow no more with a .rules file, and the designer works well.Could you please confirm it?Thanks.

Any idea on this problem? Please tell me if I didn't describe the situation clearly enough.Thanks

Hi,
Sorry for the late reply. Can you share your code in PerformLoad method of the workflow?
Thanks,
Vihang

I think I have found the reason for this problem, not because of PerformLoad.If I compile my base workflow with a .rules file, even if it is empty, the designer will refuse to read conditions from the .rules file of my derived workflow.Now I compile my base workflow no more with a .rules file, and the designer works well.Could you please confirm it?Thanks.