Program.cs

using Microsoft.Data.SqlClient;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Configuration.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

// Register your DbContext and other services here, using the connection string from appsettings.json
string connectionString = builder.Configuration.GetConnectionString("DefaultConnection");
var connection = new SqlConnection(connectionString);

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();