Access-Control-Allow-Origin Error solution - Alternative Cors Implementation

Startup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using API.Data;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.OpenApi.Models;

namespace API
{
    public class Startup
    {
        private readonly IConfiguration _config;
        public Startup(IConfiguration config)
        {
            _config = config;

        }

        // public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<DataContext>(options =>
            {
                options.UseSqlite(_config.GetConnectionString("DefaultConnection"));
            });
            services.AddControllers();
            // services.AddCors();
            services.AddCors(setup =>
            {
                setup.AddPolicy("AngularLocalPolicy",
                                config => { config.WithOrigins("http://localhost:4200").AllowAnyHeader().AllowAnyMethod(); });
            });
            
            services.AddSwaggerGen(c =>
            {
                c.SwaggerDoc("v1", new OpenApiInfo { Title = "WebAPIv5", Version = "v1" });
            });
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseSwagger();
                app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "WebAPIv5 v1"));
            }

            app.UseHttpsRedirection();

            app.UseRouting();

            // app.UseCors(x => x.AllowAnyHeader().AllowAnyMethod().WithOrigins("http://localhost:4200/"));
            app.UseCors("AngularLocalPolicy");


            app.UseAuthorization();

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

THANK YOU!!!