Unhandled InvalidOperationException

[tamlin-mike]

Seems a list currently enumerated is modified by a seldom taken code path.

Unhandled Exception: System.InvalidOperationException: List was modified
   at dnlib.Utils.LazyList`1.Enumerator.MoveNextDoneOrThrow_NoLock()
   at dnlib.Utils.LazyList`1.Enumerator.MoveNext()
   at ReferenceAssemblyGenerator.CLI.Program.RemoveNonPublicMembers(ICollection`1 types) in C:\Users\troja\source\repos\ImperialPlugins\ReferenceAssemblyGenerator\ReferenceAssemblyGenerator.CLI\Program.cs:line 156
   at ReferenceAssemblyGenerator.CLI.Program.RunWithOptions(ProgramOptions opts) in C:\Users\troja\source\repos\ImperialPlugins\ReferenceAssemblyGenerator\ReferenceAssemblyGenerator.CLI\Program.cs:line 26
   at CommandLine.ParserResultExtensions.WithParsed[T](ParserResult`1 result, Action`1 action)
   at ReferenceAssemblyGenerator.CLI.Program.Main(String[] args) in C:\Users\troja\source\repos\ImperialPlugins\ReferenceAssemblyGenerator\ReferenceAssemblyGenerator.CLI\Program.cs:line 15