VS Project References Broken On Case Sensitivity of GUID

Question

Since upgrading to VS 2015, my team has experienced random quirky things which I\'m sure are being worked out at Microsoft right now. One pretty annoying one is that we see

Answer 1

In order to use the answer in a git hook, I had to convert it to sed's regex syntax:

sed -r "s/(\{?)([0-9A-F-]+)(\}?<\/Project>)/\1\L\2\E\3/g" sample.csproj

Maybe someone finds this useful.