.net-4.5

问题 I downloaded and install .NET 4.5 beta on windows 7, but not sure where it is installed. Check C:\Windows\Microsoft.NET\Framework, can't find out folder for 4.5 Open VS 2010 and open property for one of project in a solution, there is no 4.5 in the list for Target Framework, only .Net Framework 4 there. How to make sure the installation okay and how to use it? 回答1: .NET 4.5 is an in place replacement for .NET 4.0 - that means that the assemblies are in the v4.0.xxx folder. You can also find

问题 I just read this puzzling line in Peter Richtie blog and I need help to understand the meaning Prior to .NET 4.5 you really programmed to the .NET memory model : http://msmvps.com/blogs/peterritchie/archive/2012/09/09/thread-synchronization-of-atomic-invariants-in-net-4-5.aspx Has the 'usual' .NET memory model (such as the one discussed in Jeffrey Richter book CLR via C# edition 1 and 2 (I haven't read 3d)) changed in .NET 4.5? Is there an article with conscious explanation? 回答1: The proper

问题 I have some helper methods marked with [Conditional("XXX")] . The intent is to make the methods conditionally compile when only the XXX conditional compilation symbol is present. We're using this for debugging and tracing functionality and it works quite well. During my research on how the conditional compilation works, I found several sources stating methods tagged with the Conditional attribute will be placed in the IL but calls to the methods will not be executed. How does code get

问题 I am really curious how async/await enables your program not to be halted. I really like the way how Stephen Cleary explains async/await: "I like to think of "await" as an "asynchronous wait". That is to say, the async method pauses until the awaitable is complete(so it waits), but the actual thread is not blocked (so it's asynchornous)." I've read that async method works synchronously till compilator meets await keywords. Well. If compilator cannot figure out awaitable, then compilator

问题 How can I implement Delay property from .Net 4.5 (described here) on binding in .Net 4.0? I know I cannot inherit from BindingBase as ProvideValue is sealed. I could implement MarkupExtension but it means I now have to rewrite all properties from BindingExtension is there any other way? 回答1: I would create an AttachedProperty that specifies the amount of time to Delay. The AttachedProperty would start (or reset) a timer when the bound value changes, and would manually update the bound source

问题 How can I implement Delay property from .Net 4.5 (described here) on binding in .Net 4.0? I know I cannot inherit from BindingBase as ProvideValue is sealed. I could implement MarkupExtension but it means I now have to rewrite all properties from BindingExtension is there any other way? 回答1: I would create an AttachedProperty that specifies the amount of time to Delay. The AttachedProperty would start (or reset) a timer when the bound value changes, and would manually update the bound source

问题 I'm writing a C# console application that scrapes data from web pages. This application will go to about 8000 web pages and scrape data(same format of data on each page). I have it working right now with no async methods and no multithreading. However, I need it to be faster. It only uses about 3%-6% of the CPU, I think because it spends the time waiting to download the html.(WebClient.DownloadString(url)) This is the basic flow of my program DataSet alldata; foreach(var url in the8000urls) {

问题 Business Scenario: An Update can contain packages. A Package can contain changes. Each package must be approved by somebody. After approval, a package may not be changed. To be executed, an Update must have 100% approved packages. Development Thoughts: All Data is saved as XML files. Xml "Package" elements will be signed upon approval. Problem: No matter what I try and google up, all examples are always about signing a whole document or signing sub-elements with the same key for the whole

问题 This really baffles me. I've tried removing the readonly, changing names.. What am I doing wrong here? public abstract class CatalogBase<T> where T : class { protected readonly String DataPath; protected readonly XmlSerializer Serializer; private readonly XmlSerializerNamespaces _namespaces; protected CatalogBase(String dataPath) { DataPath = dataPath; Serializer = new XmlSerializer(typeof (T)); _namespaces = new XmlSerializerNamespaces(); _namespaces.Add(String.Empty, String.Empty); } public

问题 This question already has answers here : Target 32 Bit or 64 Bit native DLL depending on environment (3 answers) DllImport - An attempt was made to load a program with an incorrect format [duplicate] (1 answer) Closed 5 years ago . I want my C# application to conditionally run a native method, conditionally choosing to run either the x86 or the x64 version of the dll. Whenever I try to load the 32 bit dll I get the below error: Unhandled Exception: System.BadImageFormatException: An attempt