Most C# developers will know what “public”, “private”, “protected” and “internal” access modifiers mean and would have had to use them in their code, but rarely do we come across the “protected internal” access modifier. Now, protected means the type or member can be accessed by derived classes, NOT restricted to the same assembly, whereas …
Stumbled across ic#code‘s free ebook ‘The fine art of commenting’ this morning, it’s from 2002 but everything still applies, you can download it here. The book covers commenting in general and not just C#, but in relation to C# here’s the list of the predefined xml tags you can use in comments (something I have …
Having spent quite a bit of time coding in F# recently I have thoroughly enjoyed the experience of coding in a functional style and come to really like the fact you can do so much with so little code. One of the counter-claims against F# has always been the concerns over performance in the most …
Performance Test – Prime numbers with LINQ vs PLINQ vs F# Read More »
Ever tried to use IEnumerable<T>.Sum on an array of unsigned long integers? Well, you can’t, because the Sum method has not been implemented for ulong or ulong?, so to fill in the gap here’s the extension methods you need using more or less the same code as the existing Sum methods: I used some custom …
Extension methods to sum IEnumerable(ulong) and IEnumerable(ulong?) Read More »
Occasionally you might want to make the value of a static or instance field local to a thread (i.e. each thread holds an independent copy of the field), what you need in this case, is a thread-local storage. In C#, there are mainly two ways to do this. ThreadStatic You can mark a field with …
Oh, the Pain! Now and again we all come across an object which requires initialization before it can be used but with nothing there to stop us from trying to use it before it’s initialized. In most cases you will get a seemingly unrelated exception (e.g. null reference when the object tries to use some …
When you have a generic interface such as: It’s easy to check whether a given instance implements the IInitializable interface with a specific T: But what if you want to find out if a type implements the IInitializable interface of an arbitrary T? You won’t be able to simply get away with this: Instead, you …
.Net Tips – How to determine if a type implements a generic interface type Read More »
By now you would have no doubt heard about the new dynamic type in C# 4 and how it has changed the way you write interop code in C#. As impressed as I am by it, I have been wondering just how much (if any) of a performance hit we’d have to pay to move …
Performance Test – Dynamic method invocation in C# 4 Read More »
Given a generic class in C# like this one: You will need to specify what the type T should be when you call the constructor: The compiler is not able to use type inference to infer the type T to be int. Now, this is interesting as type inference is supported by any other generic …
The curious lack of type inference support in C# constructors Read More »
For a while now I’ve been curious as to whether the CLR uses the ThreadPool to execute a delegate when BeginInvoke is called: Whilst common sense dictates that this must surely be true, I couldn’t be certain since I haven’t managed to find any confirmation in the documentations. Thanks to Jon Skeet and Jeff Sternal …
.Net Threading – BeginInvoke uses the thread pool Read More »
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