c#: tryparse vs convert

Question

Today I read an article where it's written that we should always use `TryParse(string, out MMM)` for conversion rather than `Convert.ToMMM()`. I agree with article but after that I got stuck in one scenario. When there will always be some valid value for the string and hence we can also use `Convert.ToMMM()` because we don't get any exception from `Convert.ToMMM()`. What I would like to know here is: Is there any performance impact when we use `TryParse` because when I know that the out parameter is always going to be valid then we can use `Convert.ToMMM()` rather `TryParse(string, out MMM)`. What do you think?

Accepted Answer

If you know the value can be converted, just use `Parse()`. If you 'know' that it can be converted, and it can't, then an exception being thrown is a good thing.

EDIT: Note, this is in comparison to using `TryParse` or `Convert` without error checking. If you use either of the other methods with proper error checking then the point is moot. I'm just worried about your assumption that you know the value can be converted. If you want to skip the error checking, use Parse and die immediately on failure rather than possibly continuing and corrupting data.

c#: tryparse vs convert

Solution

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