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using System;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Reflection;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace txn

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

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using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Threading.Tasks;
using Dapper;

namespace txn.Models
{
    public class MyItemsRepository : IService

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public interface IInvoicingService
  {
      string CreateInvoice(float numberOfHoursPerformed);
  }

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public class EuroInvoicingService : IInvoicingService
{
      private float rate = 25;
      private string currency = "EUR";
      private float vat = 0.21f;

      public string CreateInvoice(float numberOfHoursPerformed)
      {
          var value = rate * numberOfHoursPerformed;
          value += value * vat;

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public static class ServiceCollectionExtensions
{
    public static void RegisterAllTypes<T>(this IServiceCollection services, Assembly[] assemblies,
        ServiceLifetime lifetime = ServiceLifetime.Transient)
    {
        var typesFromAssemblies = assemblies.SelectMany(a => a.DefinedTypes.Where(x => x.GetInterfaces().Contains(typeof(T))));
        foreach (var type in typesFromAssemblies)
            services.Add(new ServiceDescriptor(typeof(T), type, lifetime));
    }
}

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public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.

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[Route("api/[controller]")]
[ApiController]
public class InvoicesController : ControllerBase
{
    private readonly IEnumerable<IInvoicingService> invoicingServices;

    public InvoicesController(IEnumerable<IInvoicingService> invoicingServices)
    {
        this.invoicingServices = invoicingServices;
    }

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@Component({
  selector: 'app-comp',
  templateUrl: './comp.component.html',
  styleUrls: ['./comp.component.scss']
})
export class CompComponent implements OnInit, AfterViewInit {
    @ViewChild('inputField') inputField: ElementRef;

    constructor(private elementRef: ElementRef, private renderer: Renderer) {
      super();

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using System;

namespace calculation
{
    public class Addition : ICalculation
    {
        private readonly decimal x;
        private readonly decimal y;

        public Addition(decimal x, decimal y)