Since dotnet core 2.1 the garbage collector has been easily pluggable, just by setting an env var, `COMPlus_GCName`, to point to your implementation. That does

Since dotnet core 2.1 the garbage collector has been easily pluggable, just by setting an env var, `COMPlus_GCName`, to point to your implementation. That doesn't mean it will operate without a GC mechanism per se, but it can operate with a "zero" GC that never collects garbage. I know this isn't what you meant, but thought it was an interesting point.