c# - Comparing NaN and null returns illogic value -


why following code snippet returns 1:

double = double.nan; double? i2 = null; i.compareto(i2);

from point of view makes no sense. exception more appropriate.

what think reasoning behind decision.

from documentation on compareto:

the value parameter must null or instance of double; otherwise, exception thrown. instance of double, regardless of value, considered greater null.

the value parameter in example null. nan therefore considered greater null why compareto correctly returns 1.


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