.net

问题 Why oh why is this not allowed: private static unsafe byte[] ConvertStruct<T>(T str) where T: struct { T* ptr = &str; int size = Marshal.SizeOf(str); var arr = new byte[size]; Marshal.Copy((IntPtr) ptr, arr, 0, size); return arr; } I get the compile error "Cannot take the address of, get the size of, or declare a pointer to a managed type ('T')" Or is the "struct" constraint not enough? In the sense that it could still be an managed struct? Do I understand correctly that my struct might not

问题 Let's say I have interface: public interface IFoo { int Bar1 { get; set; } int Bar2 { get; set; } } If IFoo was class, I could write: fixture.CreateAnonymous<IFoo>(); and the result will have numbers set for Bar1 and Bar2 . But how to do this with interface? I tried to use AutoMoqCustomization but this seems to be for properties with interface type and not interfaces itself. I am looking for automated way like CreateAnonymous is for classes. Currenlty I am creating interface mock and setuping

问题 When instancing an HttpClient, the one common piece of advice is: Use a singleton, do not dispose after each use. However, based on this link I see commentary which I think implies another rule: The HttpClient class instance acts as a session to send HTTP requests. An HttpClient instance is a collection of settings applied to all requests executed by that instance. In addition, every HttpClient instance uses its own connection pool, isolating its requests from requests executed by other

问题 I'm generating a WCF service using the message contract model. I have created a generic request message contract like so: [MessageContract] public Request<T> { [MessageBodyMember] public T Details { get; set; } } I'm used to using [DataContract(Name="Contract{0}")] to produce readable names for generic data contracts, but this approach does not seem to work for me using message contracts. Is there a way to achieve the same behaviour using the message contract model? 回答1: It seems like a lot

问题 I create my Tuple and add it to a combo box: comboBox1.Items.Add(new Tuple<string, string>(service, method)); Now I wish to cast the item as a Tuple, but this does not work: Tuple<string, string> selectedTuple = Tuple<string, string>(comboBox1.SelectedItem); How can I accomplish this? 回答1: Don't forget the () when you cast: Tuple<string, string> selectedTuple = (Tuple<string, string>)comboBox1.SelectedItem; 回答2: Your syntax is wrong. It should be: Tuple<string, string> selectedTuple = (Tuple

问题 I'm trying with no luck to connect a device to a .Net (4.5.2) server. It's a TCP connection opened by the device, that uses TLS 1.2. On the server side, I have a standard .Net implementation of a TCP Server: SslStream wrapped through DotNetty I cannot change anything on the device Any .Net client can successfully connect to my server using a secured TLS connection. It's working when trying with CURL too, so I've concluded my TCP server works fine. So I've compared (using Wireshark) what was

问题 I read that all primitives fall under the System namespace. If I comment out using System , I would expect there to be a build error in my program. However, it is running successfully. Why is this? 回答1: It's because int is an alias for System.Int32 , and since the "Int32" is already prefixed with its namespace (ie. "fully qualified"), the syntax is legal without having to specify using System; at the top of your code. The MSDN snippet below describes this concept- Most C# applications begin

问题 I came across the following in a code review: Type type = Type.GetType(typeName); if (type == typeof(SomeKnownType)) DoSomething(...); // does not use type or typeName typeName originates from an AJAX request and is not validated. Does this pose any potential security issues? For example, is it possible for unexpected code to be executed, or for the entire application to crash (denial of service), as the result of loading arbitrary types from arbitrary assemblies? (I suppose some joker could

问题 I came across the following in a code review: Type type = Type.GetType(typeName); if (type == typeof(SomeKnownType)) DoSomething(...); // does not use type or typeName typeName originates from an AJAX request and is not validated. Does this pose any potential security issues? For example, is it possible for unexpected code to be executed, or for the entire application to crash (denial of service), as the result of loading arbitrary types from arbitrary assemblies? (I suppose some joker could

问题 I'm trying to connect to INCA through the .NET API in order to navigate the folder structure of an ASAP2 project. Specifically, I want to get an object that represents the "Target" folder that I've highlighted below. This is proving pretty tricky--The API provides a ton of classes that have the name "Folder" in them: Folder , Asap2ProjectFolder , and IncaFolder . So what do I need to know in order to retrieve the "Target" folder? 回答1: Your first impulse might be to think of the Target folder