If the current locale uses anything other than a single hyphen-minus (U+002D) character, the table designer will be unable to design a table, giving various errors.Examples of negative sign symbols that cause SSMS to crash: -- (U+002D U+002D two hyphen-minus characters) ‐ (U+2010 Hyphen) – (U+2013 En Dash)From LOCALE_SNEGATIVESIGN documentation in MSDN (http://msdn.microsoft.com/en-us/library/dd373865(v=vs.85).aspx):> String value for the negative sign, for example, "-" for the > English (United States) locale. The maximum number of> characters allowed for this string is five, including a > terminating null character.Errors generated:1. Invalid prefix or suffix characters (MS Visual Database Tools)2. Internal Error, invalid pane configuration. (MS Visual Database Tools)3. This backend version is not supported to design database diagrams or tables. (MS Visual Database Tools)Microsoft SQL Server Management Studio version: 10.50.1617.0
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