il

The System.Threading.Interlocked object allows for Addition (subtraction) and comparison as an atomic operation. It seems that a CompareExchange that just doesn't do equality but also GreaterThan/LessThan as an atomic comparison would be quite valuable. Would a hypothetical Interlocked.GreaterThan a feature of the IL or is it a CPU-level feature? Both? Lacking any other option, is it possible to create such a feature in C++ or direct IL code and expose that functionality to C#? Update to the later post I made here: we found a better way to make the greater comparison by using additional lock

I wrote a simple object copier that copies public properties. I can't figure out why the Dynamic method is a lot slower than the c# version. Durations C# method : 4,963 ms Dynamic method : 19,924 ms Note that - as I run the dynamic method before starting the stopwatch - the duration do not include the compilation phase. I run that in Debug and Release mode, in x86 and x64 mode, and from VS and from the command line with roughly the same result (dynamic method is 400% slower). const int NBRECORDS = 100 * 1000 * 1000; public class Person { private int mSomeNumber; public string FirstName { get;

Background: I want to define few static methods in C# , and generate IL code as byte array, from one of these methods, selected at runtime (on client), and send the byte array over network to another machine (server) where it should be executed after re-generating the IL code from the byte array. My Attempt: ( POC ) public static class Experiment { public static int Multiply(int a, int b) { Console.WriteLine("Arguments ({0}, {1})", a, b); return a * b; } } And then I get the IL code of the method body, as: BindingFlags flags = BindingFlags.Public | BindingFlags.Static; MethodInfo meth = typeof

If you are willing to manipulate IL .net supports Module Initializers http://blogs.msdn.com/b/junfeng/archive/2005/11/19/494914.aspx http://tech.einaregilsson.com/2009/12/16/module-initializers-in-csharp/ Are Module initializers supported in Silverlight and Windows Phone 7? Only C++/CLI supports a module initializer. And that's only indirectly, it uses them to get the CRT started and to get unmanaged variables and objects initialized. You have to write on in IL. I tried, it worked just fine on Silverlight 4: .assembly extern mscorlib { .publickeytoken = (7C EC 85 D7 BE A7 79 8E ) .ver 2:0:5:0

I asked this question and got this interesting (and a little disconcerting) answer. Daniel states in his answer (unless I'm reading it incorrectly) that the ECMA-335 CLI specification could allow a compiler to generate code that throws a NullReferenceException from the following DoCallback method. class MyClass { private Action _Callback; public Action Callback { get { return _Callback; } set { _Callback = value; } } public void DoCallback() { Action local; local = Callback; if (local == null) local = new Action(() => { }); local(); } } He says that, in order to guarantee a

When delegate keyword is used in C#, the C# compiler automatically generates a class derived from System.MulticastDelegate class. This compiler generated class contains 3 methods as well: Invoke, BeginInvoke and EndInvoke . All these three methods are marked public virtual extern but interestingly the class itself is marked sealed . Virtual methods defined in a sealed class not only strikes as counter-intuitive but are actually illegal in C#. So my question is, is there a specific reason for this or is it just one of those harmless things done keeping in mind some hypothetical future