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What does threadsafe mean?

... safe" and so I ended up writing a delegate (sample from MSDN helped) and calling it instead. 11 Answers ...
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How to get the index of an element in an IEnumerable?

...ble is so you can lazily iterate over the contents. As such, there isn't really a concept of an index. What you are doing really doesn't make a lot of sense for an IEnumerable. If you need something that supports access by index, put it in an actual list or collection. ...
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ASP.NET MVC Html.ValidationSummary(true) does not display model errors

...rror you're adding has the key 'error' so it will not display in when you call ValidationSummary(true). You need to add your custom error message with an empty key like this: ModelState.AddModelError(string.Empty, ex.Message); ...
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How to uncommit my last commit in Git [duplicate]

... If you aren't totally sure what you mean by "uncommit" and don't know if you want to use git reset, please see "Revert to a previous Git commit". If you're trying to understand git reset better, please see "Can you explain what "git reset" d...
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onclick() and onblur() ordering issue

...useUp, no flags. This resolved the problem by letting the browser automatically re-order based on the priority of these event handlers, without any additional work from me. Is there any reason why this wouldn't have also worked for you? ...
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Xcode duplicate/delete line

Coming from Eclipse and having been used to duplicate lines all the time, it's pretty strange finding out that Xcode has no such function. Or does it? ...
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Django Admin - change header 'Django administration' text

...r app where you define this template before 'django.contrib.admin', in INSTALLED_APPS – DRC Jul 27 '13 at 7:08 1 ...
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What does auto do in margin:0 auto?

...e object that you have applied margin: 0 auto to, the object will sit centrally within it's parent container. Specifying auto as the second parameter basically tells the browser to automatically determine the left and right margins itself, which it does by setting them equally. It guarantees that t...
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Responsive image align center bootstrap 3

...When displayed on tablets, the product images look ugly because of their small size (500x500) and a width of 767 pixels in the browser. I want to put the image in the center of the screen, but for some reason I can not. Who be will help solve the problem? ...
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No line-break after a hyphen

...e break after a hyphen - on a case-by-case basis that is compatible with all browsers. 5 Answers ...