Case insensitive comparisons

From: Jony Rosenne (
Date: Fri Mar 24 2006 - 11:40:03 CST

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    Microsoft recommends for case insensitive comparisons:

    "DO: Use ToUpperInvariant rather than ToLowerInvariant when normalizing
    strings for comparison."

    I have seen similar recommendation elsewhere.

    However, I was under the impression that in Unicode it is better to do
    ToLower for removing case, because of the German SS.

    Which is better? Should the UTC take a position?


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