warnings about mystery interfaces in C# projects

Question

Every time I build my C# Solution, I get a handful of warnings about interfaces that I've never seen or written. I tried Googling for some of them, but get no hits. Could these possibly be buried in an assembly I'm referencing? If so, is there any way to make these warnings go away?

Interface 'IAlertable' is marked as [dual], but does not derive from IDispatch. It will be converted as an IUnknown-derived interface.

Interface 'ICustomizationPermissionsReports' is marked as [dual], but does not derive from IDispatch. It will be converted as an IUnknown-derived interface.

Interface 'IAlertable2' is marked as [dual], but does not derive from IDispatch. It will be converted as an IUnknown-derived interface.

Do you have the **Register for COM interop** setting checked in the project settings? — ChaosPandion, Jun 17 '10 at 14:00
Did you reference any COM dlls? You get these warnings when referenced COM components are not defined correctly. — Jakob Christensen, Jun 17 '10 at 14:03
@Chaos: in the Build section of the properties on my project, "Register for COM interop" is not checked and it's actually disabled. — Sarah Vessels, Nov 03 '10 at 18:57

score 6 · Answer 1 · edited Jan 07 '14 at 14:56

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They must come form a COM assembly you are referencing. You could try to find out which one. It looks like the wrapper code was written/generated incorrectly.

And Visual Studio does have a "suppress warnings: " text box but I am at a loss as to what to type there.
Project Properties, Build

edited Jan 07 '14 at 14:56

David Sykes

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answered Jun 17 '10 at 14:02

H H

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score 4 · Answer 2 · answered Jun 14 '11 at 01:11

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These are interfaces to HP Quality Center OTA-API "Interop.TDAPIOLELib", an ActiveX COM Type Library. Check your references.

answered Jun 14 '11 at 01:11

Tim

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warnings about mystery interfaces in C# projects

2 Answers2