Unfortunately LINQ doesn’t offer methods that could process hierarchical structures, only collections. I actually have some extension methods that could help do this. I don’t have the exact code in hand but they’re something like this: // all error checking left out for brevity // a.k.a., linked list style enumerator public static IEnumerable<TSource> FromHierarchy<TSource>( this … Read more
Variance will only be supported in a safe way – in fact, using the abilities that the CLR already has. So the examples I give in the book of trying to use a List<Banana> as a List<Fruit> (or whatever it was) still won’t work – but a few other scenarios will. Firstly, it will only … Read more
If your requirements are to have no duplicates, you should be using a HashSet. HashSet.Add will return false when the item already exists (if that even matters to you). You can use the constructor that @pstrjds links to below (or here) to define the equality operator or you’ll need to implement the equality methods in … Read more
You can use: Enum.IsDefined(typeof(Age), youragevariable)
Open the Project Properties in Visual Studio (right click on project in Solution Explorer and select “Properties” from popup menu) On the “Application” tab of the properties window, change the “Assembly name”
No, it won’t start 1000 threads – yes, it will limit how many threads are used. Parallel Extensions uses an appropriate number of cores, based on how many you physically have and how many are already busy. It allocates work for each core and then uses a technique called work stealing to let each thread … Read more
# in the string format indicate that the value is optional. If you wish to get the output 0.00 you need the following: 0.ToString(“0.00”); See here for the custom numeric formats that can be passed to this method.
Sure: public HttpResponseMessage Post() { // … do the job // now redirect var response = Request.CreateResponse(HttpStatusCode.Moved); response.Headers.Location = new Uri(“http://www.abcmvc.com”); return response; }
You don’t need to convert it. List<T> implements the IEnumerable<T> interface so it is already an enumerable. This means that it is perfectly fine to have the following: public IEnumerable<Book> GetBooks() { List<Book> books = FetchEmFromSomewhere(); return books; } as well as: public void ProcessBooks(IEnumerable<Book> books) { // do something with those books } which … Read more
I have done several WF4 projects so lets see if I can add any useful info to the other answers. From the description of your business problem it sounds like WF4 is a good match, so no problems there. Regarding your concerns you are right. Basically WF4 is a new product and is lacking some … Read more