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Entity Framework: There is already an open DataReader associated with this Command

...is executed before first one has completed the reading. The only way to avoid the exception is to allow multiple nested DataReaders = turn on MultipleActiveResultSets. Another scenario when this always happens is when you iterate through result of the query (IQueryable) and you will trigger lazy loa...
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BCL (Base Class Library) vs FCL (Framework Class Library)

...tem.String and System.DateTime. The Framework Class Library (FCL) is the wider library that contains the totality: ASP.NET, WinForms, the XML stack, ADO.NET and more. You could say that the FCL includes the BCL. share ...
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How to get the list of all printers in computer

...rious systems (hardware) running on a Windows Operating System. private void GetAllPrinterList() { ManagementScope objScope = new ManagementScope(ManagementPath.DefaultPath); //For the local Access objScope.Connect(); SelectQuery selectQuery = new Select...
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How to set enum to null

... I don't know what the issue is then, but for my compiler it did give errors until I did the cast. – StefanJanssen Aug 7 '19 at 8:50  |  ...
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How to use Session attributes in Spring-mvc

...p://www.springframework.org/schema/aop/spring-aop-3.1.xsd"> <bean id="user" class="com.User" scope="session"> <aop:scoped-proxy/> </bean> </beans> then inject class in each controller that you want @Autowired private User user 5.Pass HttpSession to...
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What is __declspec and when do I need to use it?

...or declaring COM interfaces and classes, for example, you use __declspec(uuid), for exporting functions sans a DEF file you use __declspec(dllexport), etc. The full list is quite long. – Seva Alekseyev Feb 17 '10 at 21:49 ...
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LESS CSS nesting classes

...e & character has the function of a this keyword, actually (a thing I did not know at the moment of writing the answer). It is possible to write: .class1 { &.class2 {} } and the CSS that will be generated will look like this: .class1.class2 {} For the record, @grobitto was the firs...
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Where is the “Fold” LINQ Extension Method?

... @kdbanman errr, ⁺¹, it is really interesting why back in the time it didn't work for me… :/ You're right, it does work. – Hi-Angel Nov 29 '15 at 23:23 ...
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PHP prepend associative array with literal keys?

... var channelOptions = { tags: "".split(" "), id: "1" }; initTagRenderer("".split(" "), "".split(" "), channelOptions); StackExchange.using("externalEditor", function() { // Have to fire editor after snippets, if snippets enabled...
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Loadbalancing web sockets

...answered Oct 21 '13 at 16:44 DavidDavid 2111 bronze badge ...