Fixes XAML analysis keeping file objects after they are closed. Fixes AddFromFileOutsideOfProject test. Adds first-chance exception listener for tests.
Fixes XAML analysis keeping file objects after they are closed.
Fixes AddFromFileOutsideOfProject test.
Adds first-chance exception listener for tests.

mousetraps/xtvs-common,enricosada/VisualStudio-SharedProject,mousetraps/xtvs-common,Microsoft/VisualStudio-SharedProject