en-us and we try to compare something with de-DE, their might be issues here? I know the "ß (Eszett)" stands for "ss" I think... so, what kind of issues might arise? TryParse with DateOnly, it may happen that the overload contains the IFormatProvider interface, so basically these are "settings" to change the culture specific.en-us, basically, this mean that my date format is specific to the us culture. How will that affect my TryParse or TryParseExact?