What is the worst gotcha in C# or .NET?
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by MusiGenesis
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Published on 2008-10-27T19:30:08Z
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2010/05/14
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This question is similar to this one, but focused on C# and .NET.
I was recently working with a DateTime object, and wrote something like this:
DateTime dt = DateTime.Now;
dt.AddDays(1);
return dt; // still today's date! WTF?
The intellisense documentation for AddDays says it adds a day to the date, which it doesn't - it actually returns a date with a day added to it, so you have to write it like:
DateTime dt = DateTime.Now;
dt = dt.AddDays(1);
return dt; // tomorrow's date
This one has bitten me a number of times before, so I thought it would be useful to catalog the worst C# gotchas.
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