[0xffff2]

Could you link to the feature you're talking about? Unity uses a relatively ancient version of Mono IIRC, so it's unlikely that the feature is available in Unity unless your definition of "modern C#" is "after generics were added".

[pjmlp]

Modern C# means .NET 4.6

For example GC.TryStartNoGCRegion

https://msdn.microsoft.com/en-us/library/dn906201%28v=vs.110...

SafeBuffers

https://msdn.microsoft.com/library/system.runtime.interopser...

Or using array segments

https://msdn.microsoft.com/en-us/library/9cc4bx8k(v=vs.110)....

Unity has made a lot to spread C# love among game devs, but it also gave a bad reputation to those unaware how .NET really is.

[UK-AL]

https://blogs.msdn.microsoft.com/visualstudio/2015/12/10/the...