Anonymous types are just regular types that are implicitly declared. They have little to do with dynamic. Now, if you were to use an ExpandoObject and reference it through a dynamic variable, you could add or remove fields on the fly. edit Sure you can: just cast it to IDictionary<string, object>. Then you can use … Read more
Bellow is my answer but also note that Jon Skeet spoke about it today on his blog an about the fact that he is not totally ok with the MSDN meaning of “Lazy” as MSDN isn’t really clear of what lazy exactly mean when they use it in Just how lazy are you ? his … Read more
This: MyClass c = new MyClass { StringCollection = { “test2”, “test3” } }; is translated into this: MyClass tmp = new MyClass(); tmp.StringCollection.Add(“test2”); tmp.StringCollection.Add(“test3”); MyClass c = tmp; It’s never trying to call a setter – it’s just calling Add on the results of calling the getter. Note that it’s also not clearing the … Read more
I just had the same problem. Visual Studio isn’t building the project that’s being referenced. Written Instructions: Right click on the solution and click Properties. Click Configuration on the left. Make sure the check box under “Build” for the project it can’t find is checked. If it is already checked, uncheck, hit apply and check … Read more
This option might also prove useful: LINQ AsHierarchy() extension method http://www.scip.be/index.php?Page=ArticlesNET18
Interesting article on that here. From there … … [B]y ensuring that the members do not change, we ensure that the hash is constant for the lifetime of the object.This allows anonymous types to be used with collections like hashtables, without actually losing them when the members are modified. There are a lot of benefits … Read more
Delayed execution
Take the type/ID checking out of the recursion, so just have a “give me all the controls, recursively” method, e.g. public static IEnumerable<Control> GetAllControls(this Control parent) { foreach (Control control in parent.Controls) { yield return control; foreach(Control descendant in control.GetAllControls()) { yield return descendant; } } } That’s somewhat inefficient (in terms of creating lots … Read more
A lambda expression can either be converted to a delegate type or an expression tree – but it has to know which delegate type. Just knowing the signature isn’t enough. For instance, suppose I have: public delegate void Action1(); public delegate void Action2(); … Delegate x = () => Console.WriteLine(“hi”); What would you expect the … Read more
To add on to what Ray says: For the Styles, you either need to supply a Key/ID or specify a TargetType. If a FrameworkElement does not have an explicitly specified Style, it will always look for a Style resource, using its own type as the key – Programming WPF (Sells, Griffith) If you supply a … Read more