Created
December 3, 2018 13:50
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| IFetchThings fetcher = new ClientFetcher(); | |
| object fetched = fetcher.Fetch(); // object is really a Client (Boxed as an object) | |
| // let's convert the object to a client | |
| Client c = (Client)fetched; // Unbox fetched into Client - performance hit | |
| // the compiler can't see any problem with this | |
| // and it works at run-time | |
| // let's convert the object to a project | |
| Project p = (project)fetched; // Unbox fetched into Project - performance hit | |
| // the compiler can't see a problem with this | |
| // but when it runs you get an InvalidCastException - Whoops |
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