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C# List of objects, how do I get the sum of a property

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Tuples( or arrays ) as Dictionary keys in C#

I am trying to make a Dictionary lookup table in C#. I need to resolve a 3-tuple of values to one string. I tried using arrays as keys, but that did not work, and I don't know what else to do. At this point I am considering making a Dictionary of Dictionaries of Dictionaries, but that would proba...
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C# - Keyword usage virtual+override vs. new

What are differences between declaring a method in a base type " virtual " and then overriding it in a child type using the " override " keyword as opposed to simply using the " new " keyword when declaring the matching method in the child type? ...
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When should I create a destructor?

...aged objects to exist" - For a concrete example, I have a matrix class in C# that utilizes an underlying native C++ matrix class to do a lot of heavy lifting - I make a lot of matrices - a "destructor" is far superior to IDisposable in this specific case, because it keeps the managed and unmanaged...
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Check if a folder exist in a directory and create them using C#

How can I check if directory C:/ contains a folder named MP_Upload , and if it does not exist, create the folder automatically? ...
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Code snippet or shortcut to create a constructor in Visual Studio

...ssue that I was able to fix in VS2019. Go to Options > Text Editor > C# > IntelliSense then change "Snippets Behavior" to "Always include snippets". – ScubaSteve Sep 23 '19 at 14:27 ...
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C# Test if user has write access to a folder

... That's a perfectly valid way to check for folder access in C#. The only place it might fall down is if you need to call this in a tight loop where the overhead of an exception may be an issue. There have been other similar questions asked previously. ...
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Declaring variables inside a switch statement [duplicate]

... Wow, even C# has the problem. For the simple code if (true) int i = 0; I get the following error message in Visual Studio before I even compile: Embedded statement cannot be a declaration or labeled statement Amazing. ...
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C# DropDownList with a Dictionary as DataSource

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Get the index of the nth occurrence of a string?

...eally? I can't remember ever having to do it in about 13 years of Java and C# development. That doesn't mean I've really never had to do it - but just not often enough to remember. – Jon Skeet Oct 9 '08 at 11:01 ...