When I try to Publish it gives error: "could not find file" for most .xml files

I am trying to publish my .Net MVC project and when I try to do this I get an error mentioning:

Error 1 Copying file bin\Newtonsoft.Json.xml to obj\Release\Package\PackageTmp\bin\Newtonsoft.Json.xml failed. Could not find file 'bin\Newtonsoft.Json.xml.

and this error comes for almost all

.xml

files in my bin, like:

System.Web.MVC.xml, System.Web.Helpers.xml, System.Web.Razor.xml, System.Web.WebPages.Deployment.xml

I found something relating [here]:Build succeeds, but publish fails

but couldn't really understand the solution.And yes I am using git hub Can anyone help?

Thanx in advance....