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ASP.NET vs C#: What are the differences?

Developers describe ASP.NET as "An open source web framework for building modern web apps and services with .NET". .NET is a developer platform made up of tools, programming languages, and libraries for building many different types of applications. On the other hand, C# is detailed as "Simple, general-purpose, object-oriented programming language for the .NET platform". C# (pronounced "See Sharp") is a simple, modern, object-oriented, and type-safe programming language. C# has its roots in the C family of languages and will be immediately familiar to C, C++, Java, and JavaScript programmers.

ASP.NET belongs to "Frameworks (Full Stack)" category of the tech stack, while C# can be primarily classified under "Languages".

Stack Exchange, Microsoft, and Intuit are some of the popular companies that use C#, whereas ASP.NET is used by Performance Assessment Network (PAN), Making Waves, and Jitbit. C# has a broader approval, being mentioned in 697 company stacks & 1164 developers stacks; compared to ASP.NET, which is listed in 76 company stacks and 76 developer stacks.

Decisions about ASP.NET and C#
Andrew Carpenter
Chief Software Architect at Xelex Digital, LLC · | 16 upvotes · 435.8K views

In 2015 as Xelex Digital was paving a new technology path, moving from ASP.NET web services and web applications, we knew that we wanted to move to a more modular decoupled base of applications centered around REST APIs.

To that end we spent several months studying API design patterns and decided to use our own adaptation of CRUD, specifically a SCRUD pattern that elevates query params to a more central role via the Search action.

Once we nailed down the API design pattern it was time to decide what language(s) our new APIs would be built upon. Our team has always been driven by the right tool for the job rather than what we know best. That said, in balancing practicality we chose to focus on 3 options that our team had deep experience with and knew the pros and cons of.

For us it came down to C#, JavaScript, and Ruby. At the time we owned our infrastructure, racks in cages, that were all loaded with Windows. We were also at a point that we were using that infrastructure to it's fullest and could not afford additional servers running Linux. That's a long way of saying we decided against Ruby as it doesn't play nice on Windows.

That left us with two options. We went a very unconventional route for deciding between the two. We built MVP APIs on both. The interfaces were identical and interchangeable. What we found was easily quantifiable differences.

We were able to iterate on our Node based APIs much more rapidly than we were our C# APIs. For us this was owed to the community coupled with the extremely dynamic nature of JS. There were tradeoffs we considered, latency was (acceptably) higher on requests to our Node APIs. No strong types to protect us from ourselves, but we've rarely found that to be an issue.

As such we decided to commit resources to our Node APIs and push it out as the core brain of our new system. We haven't looked back since. It has consistently met our needs, scaling with us, getting better with time as continually pour into and expand our capabilities.

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Erik Ralston
Chief Architect at LiveTiles · | 14 upvotes · 598.9K views

C# and .Net were obvious choices for us at LiveTiles given our investment in the Microsoft ecosystem. It enabled us to harness of the .Net framework to build ASP.Net MVC, WebAPI, and Serverless applications very easily. Coupled with the high productivity of Visual Studio, it's the native tongue of Microsoft technology.

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Christopher Wray
Web Developer at Soltech LLC · | 6 upvotes · 415.2K views

When I started on this project as the sole developer, I was new to web development and I was looking at all of the web frameworks available for the job. I had some experience with Ruby on Rails and I had looked into .net for a bit, but when I found Laravel, it felt like the best framework for me to get the product to market. What made me choose Laravel was the easy to read documentation and active community. Rails had great documentation, but lacked some features built in that I wanted out of the box, while .net had a ton of video documentation tutorials, but nothing as straightforward as Laravels. So far, I am happy with the decision I made, and looking forward to the website release!

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Alexander Krylkov
Sofrware Architect at Air Astana · | 2 upvotes · 229.3K views

Comparing to ASP.NET Core MVC or ASP.NET Core Web API Simplify.Web allows you to easily build your web-site or REST API without any additional/complicated setup, covering cases like localization by default. It's projects structure very lightweight, just a minimum amount of what you need to setup ASP.NET Core request pipeline.

It is build on top of Simplify.DI IOC container abstraction, no dependency on Microsoft.Extensions.DependencyInjection and it's syntax. You can easily switch between DryIoc, SimpleInjector, CastleWindsor etc.

Any internal module of Simplify.Web can be easily replaced on extended by your custom module, covering your custom cases.

For HTML pages generation Simplify.Templates can be used allowing you to use just regular plain HTML without additional setup.

Can be easily integrated with Simplify.WindowsServices converting your web application not just to web-application, but a standalone windows service which can also do some background jobs via Simplify.WindowsServices.

And it is open source, of course :)

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Pros of ASP.NET
Pros of C#
  • 21
    Great mvc
  • 13
    Easy to learn
  • 6
    C#
  • 351
    Cool syntax
  • 293
    Great lambda support
  • 266
    Great generics support
  • 211
    Language integrated query (linq)
  • 180
    Extension methods
  • 94
    Automatic garbage collection
  • 89
    Properties with get/set methods
  • 84
    Backed by microsoft
  • 71
    Automatic memory management
  • 61
    Amaizing Crossplatform Support
  • 46
    High performance
  • 43
    LINQ
  • 38
    Beautiful
  • 35
    Great ecosystem of community packages with Nuget
  • 27
    Vibrant developer community
  • 24
    Great readability
  • 21
    Dead-simple asynchronous programming with async/await
  • 19
    Visual Studio - Great IDE
  • 17
    Open source
  • 16
    Productive
  • 15
    Strongly typed by default, dynamic typing when needed
  • 15
    Object oriented programming paradigm
  • 12
    Easy separation of config/application code
  • 11
    Great community
  • 10
    OOPS simplified with great syntax
  • 9
    Operator overloading
  • 9
    Cool
  • 8
    Good language to teach OO concepts
  • 8
    High-performance
  • 8
    Events management using delegates
  • 7
    Unity
  • 7
    Linq expressions
  • 6
    Conditional compilation
  • 6
    Coherent language backed by an extensive CLR
  • 5
    Top level code
  • 5
    Organized and clean
  • 5
    Comprehensive platform libraries
  • 4
    Concise syntax, productivity designed
  • 3
    Lovely
  • 2
    Statically typed
  • 1
    Far more sleek and sphisticated than other languages
  • 1
    Simple and Readable
  • 1
    Sophisticated overall
  • 1
    Interfaces
  • 0
    Interfaces

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Cons of ASP.NET
Cons of C#
  • 2
    Entity framework is very slow
  • 1
    C#
  • 1
    Not highly flexible for advance Developers
  • 15
    Poor x-platform GUI support
  • 8
    Closed source
  • 7
    Fast and secure
  • 7
    Requires DllImportAttribute for getting stuff from unma

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What is ASP.NET?

.NET is a developer platform made up of tools, programming languages, and libraries for building many different types of applications.

What is C#?

C# (pronounced "See Sharp") is a simple, modern, object-oriented, and type-safe programming language. C# has its roots in the C family of languages and will be immediately familiar to C, C++, Java, and JavaScript programmers.

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What companies use ASP.NET?
What companies use C#?
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What tools integrate with ASP.NET?
What tools integrate with C#?

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What are some alternatives to ASP.NET and C#?
ASP.NET Core
A free and open-source web framework, and higher performance than ASP.NET, developed by Microsoft and the community. It is a modular framework that runs on both the full .NET Framework, on Windows, and the cross-platform .NET Core.
PHP
Fast, flexible and pragmatic, PHP powers everything from your blog to the most popular websites in the world.
Django
Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design.
React
Lots of people use React as the V in MVC. Since React makes no assumptions about the rest of your technology stack, it's easy to try it out on a small feature in an existing project.
JavaScript
JavaScript is most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic,and supports object-oriented, imperative, and functional programming styles.
See all alternatives