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Questions tagged [c#]

C# is a multiparadigm, managed, garbage-collected object-oriented programming language created by Microsoft in parallel with the .NET platform

6
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2answers
2k views

Unit test SHA256 wrapper queries

I have the following SHA256 wrapper. public static string SHA256(string plainText) { StringBuilder sb = new StringBuilder(); SHA256CryptoServiceProvider provider = new ...
6
votes
3answers
915 views

Is structural typing in a hierarchical model necessary?

This is part of a series of questions which focuses on a project called the Abstraction Project, which aims to abstract the concepts used in language design in the form of a framework. Another ...
2
votes
1answer
5k views

How to handle exception in REST API

Given a REST API, which throws an exception when handling a request from a client. Whenever the REST API throws an exception, it's logged and the application (in this case a console application) ...
148
votes
6answers
33k views

SOLID Principles and code structure

At a recent job interview, I couldn't answer a question about SOLID -- beyond providing the basic meaning of the various principles. It really bugs me. I have done a couple of days worth of digging ...
171
votes
5answers
144k views

When do you use a struct instead of a class? [closed]

What are your rules of thumb for when to use structs vs. classes? I'm thinking of the C# definition of those terms but if your language has similar concepts I'd like to hear your opinion as well. I ...
143
votes
7answers
288k views

Relationship between C#, .NET, ASP, ASP.NET etc [closed]

I'm really unclear on the difference between C#, C#.NET and the same for ASP and other '.NET' languages. From what I understand, .NET is a library/framework of... things. I think they're essentially ...
46
votes
3answers
65k views

What is constructor injection?

I have been looking at the terms constructor injection and dependency injection while going through articles on (Service locator) design patterns. When I googled about constructor injection, I got ...
78
votes
10answers
13k views

Exceptions, error codes and discriminated unions

I've recently started a C# programming job, but I've got quite a bit of background in Haskell. But I understand C# is an object-orientated language, I don't want to force a round peg into a square ...
45
votes
4answers
109k views

Why and when should I make a class 'static'? What is the purpose of 'static' keyword on classes?

The static keyword on a member in many languages mean that you shouldn't create an instance of that class to be able to have access to that member. However, I don't see any justification to make an ...
45
votes
3answers
5k views

Why is an anemic domain model considered bad in C#/OOP, but very important in F#/FP?

In a blog post on F# for fun and profit, it says: In a functional design, it is very important to separate behavior from data. The data types are simple and "dumb". And then separately, you ...
27
votes
7answers
13k views

How does throwing an ArgumentNullException help?

Let's say I have a method: public void DoSomething(ISomeInterface someObject) { if(someObject == null) throw new ArgumentNullException("someObject"); someObject.DoThisOrThat(); } I've been ...
44
votes
7answers
114k views

.NET Properties - Use Private Set or ReadOnly Property?

In what situation should I use a Private Set on a property versus making it a ReadOnly property? Take into consideration the two very simplistic examples below. First example: Public Class Person ...
40
votes
13answers
18k views

How do we make unit tests run fast?

We have reached the point in our project where we have almost a thousand tests and people have stopped bothering with running them before doing a check in because it takes so long. At best they run ...
13
votes
9answers
16k views

Are too many if-else statements for validation bad? [duplicate]

From the book Professional Enterprise .Net, which has 5 star rating on Amazon that I am doubting after having a read through. Here is a Borrower class (In C# but it's pretty basic; anyone can ...
46
votes
5answers
17k views

As a C# developer, would you learn Java to develop for Android or use MonoDroid instead? [closed]

I'd consider myself pretty well versed in C#. It's my language of choice at the moment, and it's where basically all my professional experience lies. Still, I'm puzzled by the existence of the ...
14
votes
10answers
51k views

Real world use of C# Delegates [closed]

I think that I conceptually understand C# delegates, however, I am struggling to find a real world example where they would be useful. Can you provide some answers detailing how C# delegates were ...
18
votes
20answers
15k views

VB.Net vs C# debate [closed]

I've been in workplaces where, at the start of a project, the "Should we use VB.Net or C#" question has been raised. Granted, it's probably less common to have to make that decision now than it was ...
11
votes
4answers
11k views

Use Dependency Injection For Data Objects?

I'm just learning about dependency injection, and am stuck on something. Dependency Injection recommends sending dependent classes through the constructor, but I'm wondering if this is necessary for ...
20
votes
5answers
20k views

Why would you ever 'await' a method, and then immediately interrogate its return value?

In this MSDN article, the following example code is provided (slightly edited for brevity): public async Task<ActionResult> Details(int? id) { if (id == null) { return new ...
19
votes
2answers
968 views

Why does shared state degrade performance?

I've been working under the share-nothing principle of concurrent programming. Essentially, all my worker threads have immutable read-only copies of the same state which is never shared between them (...
4
votes
3answers
3k views

What is the “best” way to apprach validation from the perspective of a DDD purist?

I recently asked this question: Validation inside Constructor I am trying to decide where to put the validation in a DDD app. I believe it should be done at every layer. I am now concentrating on ...
32
votes
4answers
134k views

Best way to unit test methods that call other methods inside same class

I was recently discussing with some friends which of the following 2 methods is best to stub return results or calls to methods inside same class from methods inside same class. This is a very ...
25
votes
5answers
8k views

MonoTouch vs Objective-C for iPhone/iPod/iPad development [closed]

For someone with .Net experience and wanting to develop for iPhone/iPod/iPad, is it worth learning Objective-C? Is MonoTouch a good alternative? What are some of the trade-offs when using MonoTouch vs ...
12
votes
2answers
2k views

Should I expose a “computed” value as a property or a method?

I have a C# class that represents a content type in a web content management system. We have a field that allows a web content editor to enter an HTML template for how the object is displayed. It ...
12
votes
3answers
20k views

Entity Framework and layer separation

I'm trying to work a bit with Entity Framework and I got a question regarding the separation of layers. I usually use the UI -> BLL -> DAL approach and I'm wondering how to use EF here. My DAL would ...
11
votes
7answers
3k views

Object-Oriented Class Design

I was wondering about good object oriented class design. In particular, I have a hard time deciding between these options: static vs instance method method with no parameters or return value vs ...
0
votes
1answer
4k views

How much do i need to learn in order to get an entry level asp.net job? [duplicate]

Possible Duplicate: If you develop with ASP.NET, which other technologies do you use? I'm currently learning C#, but I've noticed that there is a lot of demand for ASP.NET developers. I ...
22
votes
5answers
6k views

Which are the cases when 'uint' and 'short' datatypes are a better fit than the standard int(32)?

I understand the differences in capacity and values they can represent but it seems as though people always use Int32 regardless of whether it is appropriate. No one ever seems to use the unsigned ...
16
votes
6answers
5k views

Why is closure important for JavaScript?

C#'s lambda expression also has closures but is rarely discussed by the C# communities or books. I see far more JavaScript people and books talk about its closures than they do in the C# world. Why is ...
13
votes
5answers
10k views

When are enums NOT a code smell?

Dilemma I've been reading a lot of best practice books about object oriented practices, and almost every book I've read had a part where they say that enums are a code smell. I think they've missed ...
11
votes
10answers
6k views

What is the point of properties?

Here are some arguments for properties and my counter-arguments: Easier to use than writing getter and setter methods Getter and setter method pairs are a code smell. Making it easier to write ...
31
votes
7answers
12k views

When should I use a 2-property class over a pre-built structure like a KeyValuePair?

When should you put Key/Value type of data in it's own class instead of using a pre-built generic structure, such as a KeyValuePair or a Tuple? For example, most ComboBoxes I create contain a ...
4
votes
2answers
6k views

ASP.NET MVC 3 (C#) Software Architecture

I am starting on a relatively large and ambitious ASP.NET MVC 3 project and just thinking about the best way to organize my code. The project is basically going to be a general management system that ...
17
votes
5answers
27k views

Storing data in code

A few times in my past I've wanted to store data in code. This would be data that seldom changes and is used in places where access to a database isn't possible, practical, or desirable. A small ...
15
votes
6answers
3k views

How to hire a good C# developer if I don't know C#? [closed]

I'm a C++ developer. I know how Windows works on the native level, but I'm not a big expert in C# and .NET. Now I need a C# developer in my team (all my developers are C++). How can I hire a great C# ...
15
votes
3answers
9k views

Child to Parent linking - bad idea?

I have a situation where my parent knows about it's child (duh) but I want the child to be able to reference the parent. The reason for this is that I want the child to have the ability to designate ...
13
votes
3answers
9k views

What is the benefit to having pure POCO models?

What is the major benefit of having pure POCO models? I get that Models should be clean and simple, but I tend to like to keep the maintenance of child objects within the model classes. For example ...
2
votes
2answers
26k views

Is this a good way to compare two numbers?

If we have double numbers, let's say I want to see if some double parameter is equal to zero that is passed as double: public bool AlmostEqual(double x, double y) { double epsilon = Math.Max(Math....
24
votes
5answers
6k views

Is my usage of explicit casting operator reasonable or a bad hack?

I have a big object: class BigObject{ public int Id {get;set;} public string FieldA {get;set;} // ... public string FieldZ {get;set;} } and a specialized, DTO-like object: class ...
8
votes
4answers
3k views

What are the valid uses of static classes?

I noticed that nearly every time I see programmers using static classes in object oriented languages such as C#, they are doing it wrong. The major problems are obviously the global state and the ...
7
votes
7answers
29k views

What are the alternatives to resx file

I am developing a Windows application and I want to store all the text for labels, radio buttons, buttons, check boxes and column headers of grids at one place. I have tried using a class file, an xml ...
7
votes
3answers
3k views

What is the best practice for refactoring a static method in order to make it more testable?

Let's say you have a static method that looks something like this: public static bool Foo() { var bar = new Bar(); //do some stuff here } This method as it stands can be a real headache to ...
6
votes
3answers
4k views

What is a good design for a method that can return several logically different results?

The question title is probably too abstract, so let me provide a particular example of what I have in mind: There is a webservice that encapsulates a process of changing passwords for users of a ...
5
votes
1answer
923 views

Clean OOP-Design: How to implement single responsibility and no procedural programming

I am currently trying to refactor a piece of C# code that is somewhat procedurally written. I want to make the design clean, object oriented and using classes with single responsibilities. The code ...
5
votes
2answers
419 views

Is ok to leave untranslated advanced log?

I just had a little fight with my boss over this topic (well, the boss always wins so I will do what he wants to be done) but I'd like to have the opinion of others about this: We are making a ...
4
votes
2answers
747 views

Alternatives to type casting in your domain

In my Domain I have an entity Activity which has a list of ITasks. Each implementation of this task has it's own properties beside the implementation of ITask itself. Now each operation of the ...
23
votes
4answers
17k views

async+await == sync?

Stumbled upon this post that talks about making async web requests. Now simplicity aside, if in real world, all you do is make an async request and wait for it in the very next line, isn't that the ...
13
votes
2answers
6k views

How does C++ handle multiple inheritance with a shared common ancestor?

I'm not a C++ guy, but I'm forced to think about this. Why is multiple inheritance possible in C++, but not in C#? (I know of the diamond problem, but that's not what I'm asking here). How does C++ ...
12
votes
5answers
2k views

Is it useful to unit test methods where the only logic is guards?

Say I have a method like this: public void OrderNewWidget(Widget widget) { if ((widget.PartNumber > 0) && (widget.PartAvailable)) { WigdetOrderingService.OrderNewWidgetAsync(...
8
votes
1answer
2k views

Unit testing on visualization (3D graphics) frameworks

This is a follow up to this question. There I was asking how to do unit testing when you have a library of scientific algorithms. I have a similar problem now but with a different project. I'm ...