Implement/investigate ability to report current line in MXML file error happens at #649
Description
Is your feature request related to a problem? Please describe.
When an exception occurs loading an MXML file, the error is not always very useful. If we knew what line it occurred at it would be much easier to debug.
Describe the solution you'd like
Implement something like the solutions here: https://stackoverflow.com/questions/621059/current-line-number-from-a-system-xml-xmlreader-c-net
Describe alternatives you've considered
N/A
Additional context
N/A