I solved it :-))). The ADC must be defined and opend before the enabled temperature wake up sensor.
So every thing working so far?
Yes 43°C regardless of the Thread.Sleep and sensor responds by changing the temperature of the finger placed on the processor.
And about interops, some information?
No interopt in tinyclr 2.0.
Forever and ever? 
yes that’s their stated plan. Processors have significant power increases that largely negates the need for this. If you have a need for something that’s not “custom” that others will also need, then GHI will consider baking it into the framework
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