.NET is a popular platform for enterprise applications development due to its powerful features, excellent integration with other Microsoft technologies, and easy-to-use development tools. There have been several changes and improvements in .NET development over the years. Some of the notable changes are:

Introduction of .NET Core:
.NET Core is a cross-platform, open-source framework that enables developers to create high-performance, scalable, and secure applications for Windows, Linux, and macOS. It offers better performance, scalability, and security than its predecessor, .NET Framework. Here's an example of creating a simple .NET Core console application:

using System;

namespace HelloWorld
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
        }
    }
}


Introduction of C# 8.0:
C# 8.0 introduced several new features and enhancements, including nullable reference types, switch expressions, and async streams. Here's an example of using switch expressions:

string result = statusCode switch
{
    200 => "OK",
    400 => "Bad Request",
    401 => "Unauthorized",
    404 => "Not Found",
    _ => "Unknown"
};


Improvements to ASP.NET:
ASP.NET is a popular web development framework that allows developers to build web applications using C#. Some of the improvements include better support for cloud-based applications, improved performance, and better integration with other Microsoft products such as Azure. Here's an example of creating a simple ASP.NET web application:

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;

namespace HelloWorldWeb
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers();
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseRouting();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }
    }

    public class HelloWorldController : Controller
    {
        [HttpGet]
        [Route("api/helloworld")]
        public IActionResult Get()
        {
            return Ok("Hello World");
        }
    }
}


Entity Framework Core:
Entity Framework Core is an object-relational mapping (ORM) framework that enables developers to work with databases using C#. It offers several benefits over its predecessor, including better performance, better support for multi-platform development, and better integration with other Microsoft products.

Visual Studio:
Visual Studio is an integrated development environment (IDE) that enables developers to create, debug, and deploy .NET applications. It offers several features and tools that make it easier for developers to write, test, and deploy code, including code editors, debuggers, and profiling tools.

Overall, these changes and improvements in .NET development have made it easier for developers to create high-performance, scalable, and secure applications for a wide range of platforms and devices.

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