<t>This isn't C# per se, but I haven't seen anyone who really uses System.IO.Path.Combine() to the extent that they should. In fact, the whole Path class is really useful, but no one uses it!<br/>
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I'm willing to bet that every production app has the following code, even though it shouldn't:<br/>
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string path = dir + "\\" + fileName;<br/>
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```</t>