Month: February 2007

C# 2.0 introduced anonymous methods that allow programmers to create a callable block of code that uses parameters but is not declared as a method.  One of the places I find this to be most useful is with Invoke and BeginInvoke.  Often times, invoking a delegate is used internal to a class to perform asynchronous processing or to ensure code is executed on the GUI thread. Events generally don’t have a particular thread their handlers are run on; it’s up to the code raising the event which thread is used.  Code that modifies WinForm control data must be run on the GUI thread.  … Continue reading Reducing code-bloat with anonymous methods

.NET has strong support for collections.  Even the built-in Array type implements ICollection.  The ICollection interface derives from the IEnumerable interface to allow easy enumeration of all elements in a collection.  In C#, the foreach statement uses the GetEnumerator member of IEnumerable (a class need not implement IEnumerable, it just needs a public GetEnumerator method that returns an IEnumerator object) to begin enumeration. Previous to C# 2.0 foreach required the existence of the collection and all the elements contained therein, or a custom implementation of IEnumerator.MoveNext() and IEnumerator.Current.  Not an entirely unexpected demand, when you think of it.  If you … Continue reading Uses for yield Part One – Introduction