Issue: During VSTS agent build, you encounter errors similar to this one. Most likely during builds involving Fody:


Error: Fody: An unhandled exception occurred:
Exception:
Out of memory


Cause: This appears to be a bug related with Mono/Cecil/Fody


Solution: The current solution is to change Visual Studio for Mac or Xamarin's preference > .NET Runtimes default to "Mono 4.8.0." Please contact our support so we can carry out the setting change for you.


Reference: