Program.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.EntityFrameworkCore;


var builder = WebApplication.CreateBuilder(args);

// Configuration
builder.Configuration.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

// Services
//builder.Services.AddDbContext<NewContainerDataContext>(options =>
 //   options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));


var connectionString = builder.Configuration.GetConnectionString("NewContainerDataContext");
builder.Services.AddDbContext<NewContainerDataContext>(options =>
    options.UseSqlServer(connectionString));

//builder.Services.AddDbContext<NewContainerDataContext>();


// Add services to the container.

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

// Configure the HTTP request pipeline.
//if (app.Environment.IsDevelopment())
//{
    app.UseSwagger();
    app.UseSwaggerUI();
//}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();