这些运算符的用途是什么?
Basically when you want to provide conversions between types. LINQ to XML provides good examples... There's an implicit conversion from string to XName, so you can write:
XName name = "element";
but there's an explicit conversion from XAttribute
to int
(and many other types) so you have to include a cast in your code:
int value = (int) element.Attribute("age");
Think very carefully before providing implicit conversions - they're rarely a good idea; LINQ to XML uses them to great effect, but they can be confusing. Even explicit user-defined conversions can surprise the unwary reader.
They are used when doing operator overloading . Here's a link to a MSDN article .
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