There's certainly no shortage of resources online when it comes to ASP.NET. Diving into all the ASP.NET blogs out there can be a bit overwhelming at first. It is an open-source server-side web application framework designed for web development to produce dynamic web pages. It was developed by Microsoft to allow programmers to build dynamic web sites, web applications, and web services.

Advantages of ASP.NET:

• ASP .NET Core is multiplatform that means you can develop on OS X, Linux, and Windows and you can deploy it to OS X, Linux, FreeBSD or Windows servers. Many people think it’s somehow limited to Windows or Microsoft, but it is just no longer true.
  
• It’s very modern, very fast and lightweight. You have extremely great support in the IDE and even greater when you use Azure during development or in production.
  
• You have tons of libraries, but unlike Java, NodeJS or PHP, most of them are made by Microsoft, which means they are much more consistent.
  
• Many would agree that C# is the best language out there. It’s objectively better than PHP or NodeJS.
  
• Great documentation and a lot of learning resources.
  
• It can compile to native code using .NET Native toolchain, but still, use the same optimization like managed code.
• It’s evolving very fast and looks like it has a bright future.
  
•  .NET Core was restart that allowed to get rid of everything wrong and do it correctly.

Disadvantages of ASP.NET:

• Not so many CMS’ like in PHP. Although there are some very good in ASP .NET the community is nowhere near WordPress for example and therefore also much fewer skins or plugins
  
• Not so many supported platforms like Java. For example, Java can run on IBM mainframes, .NET cannot. But who uses mainframes anymore?
  
• JavaScript. Although I don’t consider JavaScript on the server to be a good idea in general, in some situations having the same javascript on the server (NodeJS) and the client is very handy. In this case, this NodeJS has an advantage over asp.net core.