I have create an extension follow this document to add a workitem page. And then I upload my extension and install it for my collection. Next, I add this below in my workitem definition file.
<Extensions> <Extension Id = "extensionId" /> </ Extensions>
But I didn't set <PageContribution> for any pages in my definition file. I found that it always create the page regardless of whether I added a <PageContribution> .
But according to this document(https://www.visualstudio.com/en-us/docs/integrate/extensions/develop/configure-workitemform-extensions), it tells that "Just specifying the extensions in the xml doesnt automaticaly place the page, group and control contributions defined in the extensions inside the form. To add these contributions in the form, you have to add them with a contribution tag inside the form.", it need to add the
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