Question: I have generated my xml coverage file as part of CI build on the TFS server using vNext 2015 build definition. How would one display the results in the TFS 2015 summary ? Either using the xml report or the html generated using the ReportGenerator.

Answer: 
Currently, these customizations are not supported. You can't edit the displays in new build summary. However, you can [customize Code Coverage Analysis](https://msdn.microsoft.com/en-us/library/jj159530.aspx).

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> You can submit it to User Voice site at:
>  <http://visualstudio.uservoice.com/forums/121579-visual-studio>
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Instead of using OpenCover extension, it is very convenience for you to generate code coverage result and include it in the build summary page this way:

Select the Visual Studio Test step, check the **Code Coverage Enabled** option.
[![enter image description here](https://i.stack.imgur.com/uA12S.png)](https://i.stack.imgur.com/uA12S.png)

Then, the code coverage result shows on the build summary page:
[![enter image description here](https://i.stack.imgur.com/hJr6G.png)](https://i.stack.imgur.com/hJr6G.png)