I am using Windows XP SP2, .NET Framework 2.0.50727 SP1, VS.NET 2005 with ReSharper 3.1 Full Edition build 3.1.584.3 on 2007-12-20T19:16:46.
I am using a tool from Dundas Charts. See attached pic of the ambiguous reference when I drop the Dundas Chart onto the web page. This affects the code behind in that with ReSharper-Options-Environment-IntelliSense set to ReSharper I get "no suggestions" when I do a "this.Chart1." See second attached image.
If I change the setting to Visual Studio, then + ]]> gives me the intellisense that I need.
All in all, I still get "Cannot resolve symbol Series" error on "this.Chart1.Series["Default"].Points.Clear" code for example. The website builds correctly.
Also, if I open a entirely new website project, I do not get this error in the simplest website project.