When to use object or dynamic type
Is there any specific case where those are a " proper way to do it", or is usually better to keep with the actual custom-made objects?
BIt is always better to use proper objects
Bdynamic is a relic of the past that should be avoided in new development
Bfor things like deserializing JSON, there are tools which can automatically generate proper DTO types
TAs a rule of thumb:
Never ever ever ever ever ever ever ever use
Never ever ever ever ever ever ever ever use
dynamic
RYeah thought so.. got some old project of a coworker, and there is lots of dynamic/object usage, which I honestly didnt rly use before..
RIs there any big difference between those, or are they kinda the same? (object/dynamic)
Busing object is slightly better
Bbut only slightly
Bdynamic completely turns off all form of type-checking during compilation
Bwith object, you can at least use 'is' checks to try and be a bit safer
Bit's still not preferable, though - if you have a method that takes
object as an argument, it is usually possible to make it generic insteadBin case you didn't know, object is what everything in .NET inherits from. so it's still in the type-system, just so vague and abstract it's hard to do anything useful with it safely
TI saw one usage of
dynamic in production code, and it was to do:B
Bthat worries me
REspecially when it comes to readibility, you have to search a lot of parts of the code before you even know what you are working with..
and when you use same code for multiple object types and suddenly random exceptions are coming to the fore
and when you use same code for multiple object types and suddenly random exceptions are coming to the fore
Byyyyyep
Bsuch is life with legacy codebases
TI think that's like one of the only actually acceptable-ish uses of it
Tacceptable-ish, yeah
Tstill gives you runtime errors if no overload is found I think
TI think it'll pick the most specific overload
