c#

Question: There is an object that inherits from IEnumerable . In MoveNext method of this class, a StackOverflowException occurs on the line with Regex . The regular expression itself looks for text matches in files. Remarkably, everything works on Windows 10 x64 with .Net 4.6, the error occurs on Windows …

c# – Help me fix the error Read More »

Question: There is a DB from one table in which 3 fields: ID, an English word, translation. For one of the tasks, I read only verbs using this expression (I have all the verbs that begin with the particle "To") words = wordsfromDB.Where(w => w.EnglishWord.StartsWith(“To”)).ToList(); Now I want to implement …

c# – Set the right condition with LINQ Read More »

Question: Assignment atomicity can be achieved with System.Threading.Interlocked Interlocked.Exchange(ref toItem, fromItem); But how to get an instance of a class atomically, because System.Threading.Interlocked does not have a Read(ref object) method, there is only Read(ref long) ? TObject obj = somethingObject; //Сомнение атомарности. //Поскольку передача указателя x64 не умещается в такт …

c# – Atomicity of the operation of obtaining an instance of a class on an x64 application Read More »

Question: I'm studying design patterns a lot, because I think they solve a lot of things and it's very opportune to study them. I got this statement from Macoratti's website and I confess, I didn't know how to explain it from where . What does that mean? public interface IRepository<T> …

c# – Declaring an interface with where Read More »

Question: If you need to get a record from a database by its primary key, you can use both methods. Both methods will return an entity object if the entry is present in the database, otherwise they will return null . What is their difference and when to use which …

c# – Differences between Find(), FirstOrDefault() methods when used with Entity Framework Read More »

Question: In my system I need to have two types of authentication one for a common User who will register and etc. and another for the administrator my question is how do I differentiate the two authentications using FormsAuthentication, I believe there will be some conflict for example when I …

c# – Multiple authentication types Read More »

Question: Because HubProxy was removed in the Core version of the signal client, then the question arose, in fact, how to connect to, say, 5 hubs? Do each connection for each hub? What if there are 10 of them? Move all logic to one hub? Answer: Unfortunately, in the new …

c# – ASP.Net Core SignalR how best to do? Read More »

Question: I'm making a client using Web Api. My site has the Web Api server role. I found this Microsoft reference http://www.asp.net/web-api/overview/web-api-clients/calling-a-web-api-from-a-net-client which has an example client: static async Task RunAsync() { using (var client = new HttpClient()) { client.BaseAddress = new Uri(“http://localhost:9000/”); client.DefaultRequestHeaders.Accept.Clear(); client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue(“application/json”)); // HTTP GET HttpResponseMessage …

c# – Client Web API in Windows Forms Read More »

Question: When I'm writing code I don't get the code options or the variables, I only get general things and for me the autocomplete is very helpful. Does anyone know how to activate it? Answer: You could check if you have intellisense enabled for C#. In Herramientas–> Opciones–> Editor de …

How to activate the autocomplete in Visual Studio to program in Unity C# Read More »

Question: I recently read that it is not recommended to use regular expressions for parsing html, since there is a special library. Well, here's the question: is there something better than regular expressions for parsing XAML? Additional Information: I write in C# It is desirable that the tool works with …

c# – What is better to use for XAML parsing? Read More »