Strange "&#65279" character after upgrading to Asp.Net Core RC2

This is an issue with BrowserLink: https://github.com/aspnet/Mvc/issues/4671

As mentioned by @Tratcher it's an issue with BrowserLink. If you're not using it, just comment the line in Startup.cs that activates BrowserLink:

if (env.IsDevelopment())
{
    app.UseDeveloperExceptionPage();
    app.UseDatabaseErrorPage();
    //app.UseBrowserLink();
}

I had this problem and I don't use browser link. Check if there an Empty Line at the start of any .cshtml doc. Mostly its in the _Layout.cshtml. This worked for me.