Importance of Program.cs

 Example:

var builder = WebApplication.CreateBuilder(args);

// Add services

builder.Services.AddControllers();

builder.Services.AddEndpointsApiExplorer();

builder.Services.AddSwaggerGen();

var app = builder.Build();

// Configure middleware

if (app.Environment.IsDevelopment())

{

    app.UseSwagger();

    app.UseSwaggerUI();

}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();

This file defines how the app starts, loads middleware, and sets up endpoints.