Let common projects support workflow designer

Add the workflowactivity class to a common project (such as a console project.

The workflow designer information cannot be displayed.

The following message is displayed:

You must install the "system. workflow. componentmodel. Design. iidentifiercreationservice" Service to perform this operation successfully. Make sure this service is available.

Solution.

Modify the. csproj file to add the bold text to the relevant location:
Aseembly_name_herepolictypically _ same_as_project_file
{14822709-b5a1-4724-98ca-57a101d1b079}; {FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}