Earlier, using Visual Studio 2013, I would use the amazing extension from Noah Richards , which would add Ctrl-Click as a shortcut to Go To Definition, but it did not update the extension for compatibility with VS2015. And as far as I know, VS2015 does not provide any default feature for this feature.
So, here is how I fixed it.
First download the Noah Richard extension: https://visualstudiogallery.msdn.microsoft.com/4b286b9c-4dd5-416b-b143-e31d36dc622b
Save the .vsix file somewhere on your computer
<SupportedProducts>...</SupportedProducts>
<VisualStudio Version="14.0"> <Edition>Pro</Edition> </VisualStudio>
Install Performance Power Tools 2015 .
You can try Microsoft ctrl + click go to the definition of an extension tool