[Coincoin]

As a game developer having used C# for two large scale projects, I can tell you that the garbage collector was the least of our worries.

Just be a good citizen and don't trash like crazy and the GC will never block in the action phase.

Also, don't use the default mono GC, that one is terrible.

[psyc]

Ah, but everybody's data is different, and that's the problem with a prescribed one-size fits all, too-clever mem manager. If you need a complex graph with a million nodes, then any heap walk during a frame is a catastrophe, and your only out is to write a custom mem manager within the confines of c#, or put your game's core data structure in a C++ lib.