Why does the statement
(int)"84"
throw an exception and
Convert.ToInt32("84")
does not throw an exception?
Why does the statement (int)84 throw an exception and Convert.ToInt32(84) does not throw an
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Why does the statement
(int)"84"
throw an exception and
Convert.ToInt32("84")
does not throw an exception?
First one is plain casting, which is changing a type of an object (more technically speaking, this is not casting, but type conversion). .NET indeed allows some conversions (like
inttolong, etc), but this particular one is disallowed. The reason I think this is disallowed is because only a small subset of strings can be actually converted tointand rules for doing so will be very cumbersome. Additionally, this might not play well with internationalization.The second is a method invocation, which actually parses string representation of an integer and constructs an
intout of it.