大约有 15,000 项符合查询结果(耗时:0.0289秒) [XML]

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When to use .First and when to use .FirstOrDefault with LINQ?

I've searched around and haven't really found a clear answer as to when you'd want to use .First and when you'd want to use .FirstOrDefault with LINQ. ...
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How do I abort/cancel TPL Tasks?

In a thread, I create some System.Threading.Task and start each task. 12 Answers 12 ...
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case-insensitive list sorting, without lowercasing the result?

I have a list of strings like this: 8 Answers 8 ...
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This type of CollectionView does not support changes to its SourceCollection from a thread different

I have a DataGrid which is populating data from ViewModel by asynchronous method.My DataGrid is : 8 Answers ...
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How to delete selected text in the vi editor

I am using PuTTY and the vi editor. If I select five lines using my mouse and I want to delete those lines, how can I do that? ...
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How to make a background 20% transparent on Android

How do I make the background of a Textview about 20% transparent (not fully transparent), where there is a color in the background (i.e. white)? ...
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How to install mongoDB on windows?

I am trying to test out mongoDB and see if it is anything for me. I downloaded the 32bit windows version, but have no idea on how to continue from now on. ...
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Can I install Python 3.x and 2.x on the same Windows computer?

I'm running Windows and the shell/OS automatically runs Python based on the registry settings when you run a program on the command line. Will this break if I install a 2.x and 3.x version of Python on the same machine? ...
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Javascript objects: get parent [duplicate]

I have the following (nested) object: 12 Answers 12 ...
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CodeIgniter: Create new helper?

I need to loop lot of arrays in different ways and display it in a page. The arrays are generated by a module class. I know that its better not to include functions on 'views' and I want to know where to insert the functions file. ...