Enterprise Application: Microservice in C#, Java, and Golang

Below are simple examples of a microservice in C#, Java, and Golang. Keep in mind that microservices are typically part of a larger system and involve more complex functionality, but these examples aim to illustrate the basic structure.

C# Microservice:

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

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        // Additional services can be configured here
    }

    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.Run(async (context) =>
        {
            await context.Response.WriteAsync("Microservice in C#");
        });
    }
}

Java Microservice (Using Spring Boot):

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
public class MicroserviceApplication {

    public static void main(String[] args) {
        SpringApplication.run(MicroserviceApplication.class, args);
    }
}

@RestController
class MicroserviceController {

    @GetMapping("/")
    public String hello() {
        return "Microservice in Java";
    }
}

Golang (Go) Microservice:

package main

import (
    "fmt"
    "net/http"
)

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprint(w, "Microservice in Golang")
    })

    http.ListenAndServe(":8080", nil)
}

These examples demonstrate the setup of a basic microservice using different languages and frameworks. Remember that real-world microservices would involve more complexity, including communication with databases, integration with other services, and proper error handling.