Azure WebApp Asp.NET Core 2错误：启动应用程序时发生错误

在使用Azure WebApp部署Asp.NET Core 2应用程序时，有时会遇到启动应用程序时发生错误的问题。这种错误可能由多种原因引起，包括配置问题、依赖项不正确或缺失、代码错误等等。在本文中，我们将探讨一些常见的错误和解决方法，并提供一些案例代码来帮助您解决这些问题。

csharp
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System;
namespace MyWebApp
{
    public class Startup
    {
        public IConfiguration Configuration { get; }
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }
        public void ConfigureServices(IServiceCollection services)
        {
            // 添加数据库服务
            services.AddDbContext(options =>
                options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
            // 添加身份验证服务
            services.AddAuthentication("Bearer")
                .AddJwtBearer("Bearer", options =>
                {
                    options.Authority = Configuration["Jwt:Authority"];
                    options.RequireHttpsMetadata = false;
                    options.Audience = Configuration["Jwt:Audience"];
                });
            // 添加其他服务
            // ...
            services.AddControllers();
        }
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                app.UseHsts();
            }
            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseRouting();
            app.UseAuthentication();
            app.UseAuthorization();
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }
    public class MyDbContext : DbContext
    {
        // 数据库上下文代码
    }
    public class HomeController : Controller
    {
        private readonly MyDbContext _dbContext;
        public HomeController(MyDbContext dbContext)
        {
            _dbContext = dbContext;
        }
        public IActionResult Index()
        {
            // 控制器代码
            return View();
        }
    }
    // 其他控制器和模型代码
    // ...
}