c#-5.0

My understanding is if I use async, the thread makes the web request and moves on. When the response comes back another thread picks it up from there. So there are a lesser number of tied up threads sitting idle. Wouldn't this mean the maximum number of live threads would go down? But in the example below, the code that doesn't use async ends up using lesser number of threads. Can some one explain why? Code without async (uses lesser threads): using System; using System.Diagnostics; using System.IO; using System.Net; using System.Threading; namespace NoAsync { internal class Program { private

I'd like to apply the new async await functionality to Stored Procedures / Function Imports imported in my Entity model, but have as yet been unable to with the EF6 alpha. Is it yet possible in EF6 alpha2 (or the nightly build as of 20211) to call any of the new Async methods on an Entity Function Import (which calls a SQL Stored Procedure) that returns a collection of Complex Type? e.g. private async Task<IList<Company>> getInfo (string id) { using (CustomEntity context = new CustomEntity()) { var query = await context.customStoredProcedure(id).ToListAsync(); // ".ToListAsync()" method not

With C# 6.0 I can do this var isEqual = x.Id == y.Id && x.UpdatedAt == y.UpdatedAt && x.Name == y.Name && x.RulesUrl == y.RulesUrl && x.OngoingChallenges?.Count == y.OngoingChallenges?.Count && x.MembershipIds?.Count == y.MembershipIds?.Count; Is there any nice solution to do this with C# < 6.0? I mean this part && x.OngoingChallenges?.Count == y.OngoingChallenges?.Count && x.MembershipIds?.Count == y.MembershipIds?.Count; Because in old projects we do not have possibility to use C# 6.0. How to write isEqual efficiently? x.OnGoingChallenges?.Count is equivalent to x.OnGoingChallenges != null ?

I have Visual Studio 2012 RC installed on Windows 8 Release Preview and my question is are there any useful new features not related to Metro, or is Metro what seperates .Net 4 and .Net 4.5? See What's New in the .NET Framework 4.5 and What's New for Visual C# in Visual Studio 2012 . The biggest new feature of C# 5.0 is better support for asynchronous operations, using the new await keyword. 来源： https://stackoverflow.com/questions/11548373/what-can-i-do-in-c-sharp-5-with-net-4-5-that-i-couldnt-do-in-c-sharp-4-with-n

AFAIK - ( and I read a lot about it), asynchronous methods ( not asynchronous delegates !) exists to solve the "thread is blocked" problem when dealing with I/O operations like : reading a file or downloading a file : Richter shows it quite clearly here : Task<T> is not related to the i/o blocking issue. it is simply just like open a thread ( plus extra efficiency + functionality ) - but it still causes a thread to consume cpu quanta etc. And here is my question : I've read (msdn) that : An async method provides a convenient way to do potentially long-running work without blocking the caller's

CODE:- List<Task> tasks = new List<Task>(); foreach (var item in arr)//arr contains 1000+ mailids { tasks.Add(Task.Factory.StartNew(() => { using (MailMessage msg = new MailMessage()) { msg=getmsg();//p-shadow code no erorr here SmtpClient smtp = new SmtpClient(); smtp.Host = smtpServer; smtp.Port = smtpPort; smtp.EnableSsl = isSmtpSsl != 0 ? true : false; smtp.Credentials = new NetworkCredential(smtpUName,smtpPass); smtp.Timeout = int.MaxValue; smtp.Send(msg);//---throws error.... //sql code to insert db that mail is send } }, TaskCreationOptions.LongRunning)); } Task.WaitAll(tasks.ToArray

I'm using this way for reading from serial port : public static void Main() { SerialPort mySerialPort = new SerialPort("COM1"); mySerialPort.BaudRate = 9600; mySerialPort.Parity = Parity.None; mySerialPort.StopBits = StopBits.One; mySerialPort.DataBits = 8; mySerialPort.Handshake = Handshake.None; mySerialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler); mySerialPort.Open(); Console.WriteLine("Press any key to continue..."); Console.WriteLine(); Console.ReadKey(); mySerialPort.Close(); } private static void DataReceivedHandler(object sender,