ASP.NET

Flexible

Extendable

Feature rich

Starting a new ASP.Net project can sometimes seem daunting to get all the initial libraries in place unless you use a predefined scaffold. This is getting better.

You are tied to the Microsoft/Azure platforms for deployment of ASP.Net applications. However, Net Core helps alleviate this.

Language choices (VB, C#, F#, C++) can seem a little daunting at times.

Ease of use with drag and drop functionality; makes the learning curve less steep as new users are already familiar with this paradigm.

Powerful .Net Framework libraries

Control panel to manage and control the building of web applications

Code-behind can be in C# or VB.NET

It works very well other Microsoft tools but could have better integration with other platforms

Fewer open-source projects to use as examples, templates, and code-snippets

Can be cost-prohibitive for smaller companies or if your business requirements demand 3rd party (or additional) libraries, tools, etc.

C# is a great language and .NET has a lot of powerful functionality like LINQ.

Easy to integrate with SQL server and other Microsoft solutions (Entity Framework is great).

Microsoft tools - get the latest updates and support. They usually have great offerings for early stage startups.

Single page applications are much easier on a plain Javascript Stack-like client side frameworks or NodeJS.

Heavily dependent on visual-studio and the Microsoft Stack.

Still lacking in the ease of getting started and quickly deploying things.

Hard to find good developers that don't have a bias for ASP.NET.

NET is a rich framework which provides vast amounts of functionality, which helps speed up development

NET is supported by an array of high-quality tooling from Microsoft, such as TFS and Visual Studio

There a large community of experienced ASP.NET developers which means patterns and practices are well documented and there is also plenty of discussion opportunities within the community, such as conferences, meetups, and forums.

The large user base means that recruitment can be easier

Cost is the main one - Microsoft tooling and infrastructure can be very expensive

Some developers are anti-Microsoft which means not everyone is enthusiastic about joining a "Microsoft house"

Easy to integrate with IIS on any windows server

Easy to integrate with SQL Server

Easy to create web apis restful or rpc

need easier integration of css pre-compilers

Great Community support

Amazing development environment and ecosystem including debugging

Easy deployments

Easy to find resources with this skillset

Single page applications are still difficult to develop

Cost can be a possible issue

Not enough tools for SEO and ADA requirements

Templating engine - ASP.NET Razor markup allows an easy way to embed server-based code into web pages, and the powerful build in helper methods allow complex functionality to be included with a single line of code.

Extensibility - ASP.NET can take advantage of the massive amount of third-party components and extensibility provided by the .NET Framework and related infrastructure. For instance, NuGet.org provides thousands of components that can be used and incorporated into ASP.NET applications.

NET is tied to Windows and IIS. However the future of ASP.NET is ASP.NET Core, which is the reimagining of ASP.NET in a platform independent manner.

.NET runs well in a variety of Windows environments.

It integrates seamlessly with other Microsoft product (SQL Server, Azure, etc).

The documentation for much of the MSDN could be improved. That said, they have done a much better job with .NET Core.

Web Applications

Ecommerce Applications

Best HTML Framework with managed code!

NET used to be very similar to java server faces and abstracting the html layer too far.

NET MVC enables direct html manipulation through Razor Syntax

Using ASP.NET MVC the performance of ASP.NET is limited

Collaboration with AJAX controls - There are ample of AJAX controls available that come with fascinating functionalities.

Built-in Windows authentication - It comes with built-in Windows authentication that can be configured as per your requirements.

Simplicity - It provides simplicity as ASP.NET makes it easy to perform common tasks, from simple form submission and client authentication to deployment and site configuration.

The biggest disadvantage with ASP.net is its cost. However, there are other similar technologies like PHP that are available in the market with nominal cost or for the matter at no cost.

Its tight coupling with IIS server is another disadvantage. There are no other choices in server selection.

It is widely known that IIS and Windows have a documented history of bugs and vulnerabilities in the programs. That is a security [threat].

Utilizes .NET framework and familiar languages such as C# which makes it very easy to learn.

Native support for MVC via ootb templates.

Web API 2 allows very easy creation of RESTful Web Services.

It can get pricey in order to use the full feature set of VS enterprise (free community edition available).

Potentially harder implementation of web applications when not using the native MS technologies such as IIS.

Net MVC provides lot of flexibility in creating your custom handlers, custom events as per your business needs. The entity framework works well with ASP.net.

Setup/Getting up to speed is really easy. ASP.NET has a healthy community of users. We can get help from MSDN articles and many blogs/articles.

MVC 6 has some really cool features/support for bootstrap.

Recent technologies like Node.js and Angular are picking up fast. Most of the controls run at server which is a huge drawback when compared to other technologies.

Out of the box support is missing for many features - Logging, caching (distributed).

IIS setup is not easy/straight forward unless you go for simple deployment.

It drastically reduces the amount of code required to build large applications.

Easy to learn.

Many third party libraries are available.

The main disadvantage is cost. Windows server licenses, SQL Server licenses, Visual Studio licenses, etc., are all costly compared to open source alternatives.

Complicated page lfe cycle.

Limited control over HTML.