This is a design methodology that significantly reduces the number of decisions while developing the application, and thus making it simpler.

If you have built any application using any technology, you might be using some kind of XML file where you have to configure everything in it. Even for the simpler straightforward things, we might have to configure the things over there.

ASP.NET MVC embraces convention over configuration completely. It is the philosophy where you can be certain of how it is going to work without ever configuring same.

Let me give you a simple example. All Controller code resides in the Controller folder, and Views have a separate folder for each of the Controllers. Whenever a request comes, ASP.NET MVC knows where to find the Controller and its associated View without any configuration. This methodology results in less configuration and less time in debugging.

As discussed earlier, ASP.NET MVC has three major components—Model, Controller, and Views. This clearly separates the responsibilities so that the UI designer or UI developer can work on the View while backend developers can work on the Model to build a data domain for the application or to talk to the database. As the duties of each of the components are clearly defined and separated, the work can be done in parallel.

If you have any experience in building an ASP.NET Web Forms application, you might have used ASP controls such as asp:textbox. Even though these controls have a lot of benefits, they have their cons as well. Developers cannot have complete control over the generated HTML when using these controls. Of course, you can set some properties in ASP control which in turn set some attributes in your generated HTML. But complete control is not possible. ASP.NET MVC HTML helpers and Tag helpers in ASP.NET Core provide better control over the generated HTML.

As each of the components is separated and compartmentalized, creating the unit test cases becomes easier to achieve:

The code for the earlier version of ASP.NET MVC (till ASP.NET MVC 5) is as follows:

publicclassValuesController : ApiController
{ 
  // GET api/values 
  publicIEnumerable<string>Get()
  { 
    returnnewstring[] { "value1","value2"}; 
  } 
} 
Code for ASP.NET Core: 
publicclassValuesController:Controller
{ 
  //GET api/values 
  [HttpGet] 
  publicIEnumerable<string>Get()
  { 
    returnnewstring[] { "value1","value2"}; 
  } 
}