I\'m using Visual Studio 2012 Ultimate and Resharper and whenever I search for (and open a file) by name (using the \"Go To File\" shortcut of Control-Shift-T) the file open
And if you want to keep the Preview Tab, but want that currently previewed file to stay open, press Ctrl-Alt-Home. The equivalent Visual Studio command is Window.KeepTabOpen
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Simply go to : Tools >> Options >> Environment >> Tabs and Windows
Then uncheck the "Allow new files to be opened in the preview tab" in the Preview Tab section
Found the answer from there actually : Disable file preview in VS2012