How to extract interface from class in Visual Studio 2017

Question

The functionality to extract an interface from a class (C#) seems to change in VS 2017. How can I do that in Visual Studio 2017.

can you describe the expected behavior of older version VS? – Lei Yang Apr 19 '17 at 01:43 — Lei Yang, Apr 19 '17 at 01:43

ProgrammingLlama · Accepted Answer · 2019-06-04T00:10:00.550

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Right-click the class name and select "Quick Actions and Refactorings..." and then select "Extract interface..."

Note that you can also click on the class name and press Ctrl+. to bring up the same context menu.

edited Jun 04 '19 at 00:10

answered Apr 19 '17 at 01:49

ProgrammingLlama

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Same as in VS2015, just slightly different name – Zac Faragher Apr 19 '17 at 01:56
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For some reason, I'm not seeing this behavior. I used it all the time in 2015, but now all I see is "Generate overrides..." – Oct 31 '17 at 20:51
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Huh. Looks like I have to add a public property or method to a class before I can interface it... I guess that makes sense... but I don't like it. – Oct 31 '17 at 21:02

score 5 · Answer 2 · answered Dec 11 '17 at 09:36

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With ReSharper installed, right click the class name: Refactor > Extract > Extract Interface...

Keep in mind that the Extract Interface... option is not even in the menu if the class is static. The same goes for the class members if they do not appear in the menu where you select what goes in the interface.

I completely forgot that you cannot have a static class with an interface or extends at all for that matter.

answered Dec 11 '17 at 09:36

Heki

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See also [resharper extract interface grayed out](//stackoverflow.com/q/23850048) – Michael Freidgeim Aug 02 '18 at 02:20

score 3 · Answer 3 · answered Jul 02 '19 at 16:32

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Extract an interface refactoring

Place your cursor in the class name.

Press Ctrl+R, then Ctrl+I.

https://learn.microsoft.com/en-us/visualstudio/ide/reference/extract-interface?view=vs-2019

answered Jul 02 '19 at 16:32

Maisam Razai

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score 2 · Answer 4 · answered Jul 28 '20 at 22:49

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I had the same problem with Visual Studio Community 2019 and I fixed it by disabling Resharper.

answered Jul 28 '20 at 22:49

Shari Valenta

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score 1 · Answer 5 · answered Oct 16 '18 at 09:22

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For some users the menu on right click on the class seems be deleted and now you can access only by right clicking on the class that you want to create the interface and than click on Quick actions and refactoring.

How to extract interface from class in Visual Studio 2017

5 Answers5