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• Why can't I create extension methods for static classes?

  - by dotnetdev

  When I try to create an extension method for the File class, I get an error telling me that I cannot do this because the class is static. However, I don't see why this stops the creation of an extension method, what implication is there? Thanks

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• Should I implement IDisposable here?

  - by dotnetdev

  My method which calls SQL Server returns a datareader but because of what I need to do (return the datareader to the calling method which is in page code-behind), I can't close the connection in the class of the method which calls sql server, so I have no finally or using blocks. Is the correct way of disposing resources to make the class implement IDisposable? Or from the caller, explicitly dispose the unmanged resource (class-level fields)? Thanks

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• What influences the timing of a GC?

  - by dotnetdev

  I know it is not possible to know when a gc occurs, but there are factors that will tell you how often/when it may occur. What factors are these? One is how many objects are created, etc. Thanks

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• Is it possible to write syntax like - ()() ?

  - by dotnetdev

  I read in an ebook somewhere (which I'm desperate to find again), that, by using delegates, it is possible to write code which has syntax as follows: ()(); // where delegate proceeds this. Can anyone provide any details how this would be possible/in what situation this would occur? Thanks

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