I download Visual Studio 2013 and install it on my development computer recently.
IntelliSense was unable to determine an accurate completion list for this expression.
The provided list contains all identifiers in the file.
Below the steps to do this is explained for Visual Studio programmers.
Follow Visual Studio 2013 menu bar options: Tools > Options.
In Options screen on the left hand side, drill down through the following path:
Change the Reference Group to Implicit (Web)