Created Issue: DataForm parses double incorrectly [11122]

I have a DataForm with double? fields. When I enter 1,7 it gives me no parse-error but the double? in the datastructure becomes 17. Entering 1.7 is parsed correctly. In general, it seems like the comma is ignored. On my computer I use '.' as decimal-point for numbers.

Using double.TryParse() should work fine. Is this used internally for validating doubles/floats?