string.ToLower() and string.ToLowerInvariant()

Question

What\'s the difference and when to use what? What\'s the risk if I always use ToLower() and what\'s the risk if I always use ToLowerInvariant()?

Answer 1

I think this can be useful:

http://msdn.microsoft.com/en-us/library/system.string.tolowerinvariant.aspx

update

If your application depends on the case of a string changing in a predictable way that is unaffected by the current culture, use the ToLowerInvariant method. The ToLowerInvariant method is equivalent to ToLower(CultureInfo.InvariantCulture). The method is recommended when a collection of strings must appear in a predictable order in a user interface control.

also

...ToLower is very similar in most places to ToLowerInvariant. The documents indicate that these methods will only change behavior with Turkish cultures. Also, on Windows systems, the file system is case-insensitive, which further limits its use...

http://www.dotnetperls.com/tolowerinvariant-toupperinvariant

hth