String.Compare behavior

Question

How can it be? (This is taken from the VS2008 direct window)

?string.Compare("-", "+")
-1
?string.Compare("-0", "+0")
1

Answer 1

From the comments on String.Compare (highlighted by me):

The comparison uses the current culture to obtain culture information, such as casing rules and the alphabetical order of individual characters. For example, a culture may indicate that certain combinations of characters are treated as a single character, or upper and lower case characters are compared in a certain way, or that the sort order of a character depends on the characters that precede or follow it .

Answer 2

#:

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. , , . System.Globalization.CompareOptions.