Questions tagged [.net]
.NET is a software framework supporting a multi-language paradigm and supporting language interoperability. .NET applications are executed in a virtual machine (CLR) which provides a few important services: security, memory management and exception handling.
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Optimizing a EF Core "upsert" operation
I'm trying to "optimize" the command below. In other words, to make it suit my needs using best practices. I found a lot of posts regarding the "upsert" operation and there were a ...
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OOP methods/functions that can return a value or an exception
I'm currently working through a series of bugs in an application. Our application is written in C#/ASP.NET (on the server) and HTML/CSS/JavaScript (on the client). We are using ELMAH to log any ...
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Extend the login timeout in a ASP NET 7 application
My ASP Core web application was recently upgraded from NET6 to NET7. Almost zero problems except one, which still puzzles me.
With the "old" NET6 version, once an user log then app in (...
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Request-response model over sockets/websockets
This is a request-response model over sockets/websockets (like HTTP) where you technically match request id to response id and return the response. In addition to that, there is timeout in case that ...
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Saving entity containing complex jsonb column with validation and comparision
I've been a .NET Developer for almost 4 years. I'm stronly learning and trying using design patterns and following SOLID principles for 3 months right now (I know - a little late, but better late ...
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Decrypt incoming HTTP request headers
During each HTTP request incoming from my Angular front-end I send encrypted pair of access & refresh token. On the back-end ASP.NET web APIs are used.
The way I decrypt them currently is by ...
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Serilog logging extension methods
I've been using this extension in almost all of my projects. What's your opinion? Do you think there is something else to add or to be improved? The idea is to ignore all default ASP.NET messages that ...
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Redis Output Cache Store refactoring - IOutputCacheStore Redis Implementation
This code incorporates the new .NET 7 Output Caching. I would like to get some refactoring tips on the RedisOutputCacheStore class.
How to use
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Is this a good implementation of Dependency Injection using MVVM without any nuget packages?
So I've been looking into dependency injection for WPF while still using an MVVM pattern.
And something that's been incredibly difficult to wrap my head around was, how to create a navigation service ...
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Modified PoC for BlogEngine.NET CMS (CVE-2019-6714)
This is a modified exploit proof of concept targeting the BlogEngine.NET content management system (CVE-2019-6714) for the .NET framework. I modified it (from Cobb 2019) to execute payloads via ...
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A program that uses three methods to reverse and print an array
I have this code that uses three methods to do certain tasks. One creates an array, another reverses it and the other one prints it out(it was required to use three methods). A person recommended me ...
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Transliterate between Cyrillic and Latin scripts
I want to get a code review on the following transliteration code. I wrote it because there were some libraries that I have tried and they were specifically failing with the name "Yuliya" ...
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A service that downloads the whole trade history off an exchange and involves Redis cache
This service is pulling off the whole trade history for the Binance accounts. More precisely, it's a wrapper around https://binance-docs.github.io/apidocs/spot/en/#all-orders-user_data. Since their ...
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Serial port class wrapper for serial port object VB.NET
I've been reviewing some code that I maintain recently, and I came across this wrapper object for the serial port class. I'm trying to understand the advantage of this seemingly redundant object:
<...
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Seekable HTTP response stream wrapper
I created this wrapper to use together with HttpClient streams and ZipArchive. ZipArchive ...
CommunityBot
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Find closest value in a big list
There are solutions e.g.
list.OrderBy(item => Math.Abs(number - item)).First()
or
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Use a static field for cache an authentication token in .NET API
I have a .NET 6 web API that does some requests to another third party API, this API has a token that expires after a few hours, so I want to cache this token and reuse in the requests.
Here how I ...
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Reflection optimization
In a web application I'm working on I have a class that Map objects to other (different) objects. It is implemented with something like:
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Creating a simple HTTP GET endpoint that pulls off products from a mocked API and returns filtered subset of products
I was given a task assessment for the interview of a company and here is the code that I shared with them https://github.com/Hulkstance/poq. I wonder what suggestions you would write to me.
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RabbitMQ ConnectionFactory wrapper
This is a wrapper around RabbitMQ.Client's ConnectionFactory. Here is the simplest Producer/Consumer RabbitMQ example https://github.com/delaneybrian/jumpstartCS-...
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Refreshing customer list periodically in the background
I have a method RefreshCustomersInternal that refreshes customer data from a server and returns a Task. Since this process is ...
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C# .NET 6, implementation of concurrent throttling tool
I'd like to seek advice on my implementation of rate controlling or throtting tool which implemented by C#.NET 6.
correctness of implementation
performance issue or any improvement
can be done.
<...
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Correct way to delete elements from a ConcurrentDictionary with a predicate
I have written a caching wrapper class for ConcurrentDictionary. Basically it has a timer that checks if items are expired and removes them. Since ConcurrentDictionary does not have RemoveAll method ...
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Extension methods to modify an async Task's type from Task<IEnumerable<T>> to Task<List<T>>
I've written a lot of (await SomeTask).AsList(); in my project, and it's kind of annoying to keep wrapping it.
To fix this I've written a little extension method on ...
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Unit testing / TDD MediatR Queries and Validators
I would like to get a code review for the following code. It's meant to filter mocked products. I used to not like writing tests, but some time ago I realized how great TDD is. Not only it makes the ...
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Drawing a rectangular playing field
I created a method to print a playing field in the console, but I think there are much better ways to do this than mine.
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Struct that parses full name into first name, middle name, last name and suffix
The struct below parses full name into first name, middle name, last name and suffix.
Perhaps Builder pattern is more appropriate here? I remember there was a principle referring to the number of ...
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Creating complex object step by step
Builder pattern separates object construction from its representation
I have to generate username and password for the Account class. Since this operation is a bit ...
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TPL Dataflow ActionBlock that doesn't allow the same data to exist in the buffer
I'm implementing a queue to update leaderboards when score data changes in the background. Updating the leaderboard is a relatively expensive operation, so if we say "Update leaderboard 5" ...
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Project sequence to multiple sequences using LINQ (or extension methods)
I'm creating a method that expands a sequence.
This is a sample of how it works:
Input: {1, 2, 3}
Output: {1}, {1, 2}, {1,2,3}
So far, I've been able to solve the ...
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Factory method doesn't meet the DRY principle
I'm using Proto.Actor and I have an actor which acts as a proxy and forwards the messages to the appropriate exchange just because each exchange has different subscription methods, different ...
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Is this the correct usage of ConcurrentDictionary<TKey, TValue>?
I need to make a simple class that tracks how many clients are listening to a specific item, will be referred to as building hence forth. I will have a timer running that will check which buildings ...
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Parsing information from Excel files
I have to parse information from several Excel files (.xls, .xlsx). The structure of the files is nearly identical except for the columns order. In this case it is ...
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Calculator Program improvements
I'm pretty new to programming and made a few programs so far. I recently made a Calculator program and I hope you guys could tell me what I could do to improve.
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Finding exceptions and optimisations in weather forecast service
When creating a new Blazor project, there is a page called FetchData which gives an example of a razor page using a service to pull data to a page.
I set myself a ...
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List the movies I haven't seen
I am new to programming and have been taking the time to learn C# by reading, doing some classes online for Unity, and using Youtube. I think you learn more from doing your own projects so I decided ...
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Asynchronous tasks to subscribe to orders and fills
Pretty straightforward question. The methods SubscribeToOrdersAsync and SubscribeToFillsAsync are pretty similar due to ...
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BaseController with Generic Entity and Model
I created a controller with generic TEntity and TModel so that i will not have to repeat common actions like save/delete for each entity. I just want to ask if this is a good or a bad practice?
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ASP.NET Core simple DB cleaner background service
In an application there is a table for one-time-passwords (OTP) which will be sent to users via SMS. These OTPs are needed for a maximum of two hours in order to detect abusing behaviours.
A simple DB ...
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Run control tasks asynchronously using TPL
One of my classes regularly triggers one of two asynchronous operations: a "turn on" and a "turn off" that each take about a second. I'm using this method below to make sure that they don't run ...
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C# Async FileInfo Extensions (Copy, Move, Delete)
Here is my effort to implement extensions for FileInfo object:
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File Abstraction Library
This library is a layer of abstraction over file operations in C#. It aims to provide easy file IO syntax, and implicit error handling behaviors, to ensure robustness in scenarios including, but not ...
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Barnes-Hut implementation of the N-Body problem translated from F# to C#
I am after a peer review of a C# implementation of the Barnes-Hut algorithm which I have translated from F#. The F# version is the base for comparison, therefore the C# version is suppose to reflect ...
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Filter duplicate events raised by FileSystemWatcher
As you know about FileSystemWatcher Events, which may fired twice or more according to OS handling, For example creating a .txt file may fires two events (1)For ...
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C# Binary Search Tree implementation
I have implemented a Binary Search Tree and would really appreciate it if someone could take time to check it and give me feedback.
I try to keep my code clear and simple.
Is it readable?
Is the API ...
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ASP.NET Core background logger queue with dynamic workers
In a docker compose environment there are several apps that communicate with each other. One of these apps is a logger (a centralized logger). Every part of the system that needs to log something, ...
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AutoResetEventAsync, am I missing something?
So I wrote an asynchronous version of AutoResetEvent:
...
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Improving multiple FirstOrDefault statements on same collection
I'm having multiple FirstOrDefault() statements, in this case 2, on a collection.
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