.net-4.0

(the following items has different goals , but im interesting knowing how they "PAUSEd") questions Thread.sleep - Does it impact performance on a system ?does it tie up a thread with its wait ? what about Monitor.Wait ? what is the difference in the way they "wait"? do they tie up a thread with their wait ? what about RegisteredWaitHandle ? This method accepts a delegate that is executed when a wait handle is signaled. While it’s waiting, it doesn’t tie up a thread. so some thread are paused and can be woken by a delegate , while others just wait ? spin ? can someone please make things clearer

This question already has answers here : Closed 6 years ago . Possible Duplicate: Conditional compilation and framework targets I have some code that works in .NET 4, but it does not work in .NET 3.5. In .NET 3.5 it requires to use interop calls to Windows. I would like using a "ifdef" to use a different code path in both cases (eventually I will deprecate the .NET 3.5 code). Is there a pre-defined directive value to identify when the code is compiled with .NET 4? Is there a good link with all the predefined directives ( DEBUG , TRACE , etc.)? The page below only gives the directives, but not

I`m facing the following problem when dealing with inserting new entities in the DB that has Guid as primary keys - EF 5 with Code first approach. I know there are a lot similar topics as I was roving for hours for this issue, but I couldn`t find topic with this problem. As an example, my POCO class is: public class EntityRole : IAdminModel { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public Guid Id { get; set; } [Required] [MaxLength(50)] public string Name { get; set; } [Required] [Display(Name = "Role code")] [MaxLength(20)] public string RoleCode { get; set; } [Display

I am writing a Console app in C# 4 and want to gracefully cancel my program and Ctrl + C is pressed. The following code I have used many times before, but now when trying to use it in .NET 4, it seems a strange unhandled exception is occurring. namespace ConsoleTest { class Program { private static bool stop = false; static void Main(string[] args) { System.Console.TreatControlCAsInput = false; System.Console.CancelKeyPress += new ConsoleCancelEventHandler(Console_CancelKeyPress); while (!stop) { System.Console.WriteLine("waiting..."); System.Threading.Thread.Sleep(1000); } System.Console

I wrote a WPF application in C# using VS 2010. The application will run fine in debug mode using Visual Studio, but when I go to run the .EXE from the bin\release folder, nothing happens. I do not get any error messages from windows and there are no errors or warnings in VS. I have tried to build, rebuild and clean the solution (in every possible order) with no luck. My solution contains 2 projects, both of which use .NET 4.0 framework, and I have .NET 4.0 installed on my PC. I have tried on both XP and Win7 and still nothing. I also just noticed that the output from Debug when I run the

I'm investigating the Parallelism Break in a For loop. After reading this and this I still have a question: I'd expect this code : Parallel.For(0, 10, (i,state) => { Console.WriteLine(i); if (i == 5) state.Break(); } To yield at most 6 numbers (0..6). not only he is not doing it but have different result length : 02351486 013542 0135642 Very annoying. (where the hell is Break() {after 5} here ??) So I looked at msdn Break may be used to communicate to the loop that no other iterations after the current iteration need be run. If Break is called from the 100th iteration of a for loop iterating

In the code snippet below, I'm getting a FormatException on 'this.Recipients'. More specifically, the message is "An invalid character was found in the mail header: ';'". Recipients is a string of three email addresses separated by semicolons (the ';' character). The list of recipients is read from an app.config and the data is making it into the Recipients variable. How can I be getting this error when multiple recipients should be separated by a semicolon? Any suggestions? As always, thanks for your help! public bool Send() { MailMessage mailMsg = new MailMessage(this.Sender, this.Recipients