using System.ComponentModel.DataAnnotations;

namespace BlazorWasmUpload.Shared
{
    public class User
    {
        [Required]
        public string Name { get; set; }

        [Required]
        [Range(18, 90)]
        public int Age { get; set; }
    }
}

namespace BlazorWasmUpload.Server.Controllers
{
    [ApiController]
    [Route("api/[controller]/[action]")]
    public class FilesController : ControllerBase
    {
        [HttpPost]
        public async Task<IActionResult> CreateUser(
            [FromForm] User userModel,
            [FromForm] IList<IFormFile> inputFiles = null)

using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Components.Forms;

namespace BlazorWasmUpload.Client.Services
{
    public interface IFilesManagerService
    {
        Task<HttpResponseMessage> PostModelWithFilesAsync<T>(string requestUri,
            IEnumerable<IBrowserFile> browserFiles,
            string fileParameterName,
            T model,
            string modelParameterName);
    }

    public class FilesManagerService : IFilesManagerService
    {
        private readonly HttpClient _httpClient;

        public FilesManagerService(HttpClient httpClient)
        {
            _httpClient = httpClient;
        }

        public async Task<HttpResponseMessage> PostModelWithFilesAsync<T>(
            string requestUri,
            IEnumerable<IBrowserFile> browserFiles,
            string fileParameterName,
            T model,
            string modelParameterName)
        {
            var requestContent = new MultipartFormDataContent();
            requestContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data");

            if (browserFiles?.Any() == true)
            {
                foreach (var file in browserFiles)
                {
                    var stream = file.OpenReadStream(maxAllowedSize: 512000 * 1000);
                    requestContent.Add(content: new StreamContent(stream, (int)file.Size), name: fileParameterName, fileName: file.Name);
                }
            }

            requestContent.Add(
                content: new StringContent(JsonSerializer.Serialize(model), Encoding.UTF8, "application/json"),
                name: modelParameterName);

            var result = await _httpClient.PostAsync(requestUri, requestContent);
            result.EnsureSuccessStatusCode();
            return result;
        }
    }
}

namespace BlazorWasmUpload.Client
{
    public class Program
    {
        public static async Task Main(string[] args)
        {
            var builder = WebAssemblyHostBuilder.CreateDefault(args);
            // ...

            builder.Services.AddScoped<IFilesManagerService, FilesManagerService>();

            // ...
        }
    }
}

@code
{
    IReadOnlyList<IBrowserFile> SelectedFiles;
    User UserModel = new User();
    bool isProcessing;
    string UploadErrorMessage;

@page "/"

@using System.IO
@using BlazorWasmUpload.Shared
@using BlazorWasmUpload.Client.Services

@inject IFilesManagerService FilesManagerService

<h3>Post a model with files</h3>

<EditForm Model="UserModel" OnValidSubmit="CreateUserAsync">
    <DataAnnotationsValidator />
    <div>
        <label>Name</label>
        <InputText @bind-Value="UserModel.Name"></InputText>
        <ValidationMessage For="()=>UserModel.Name"></ValidationMessage>
    </div>
    <div>
        <label>Age</label>
        <InputNumber @bind-Value="UserModel.Age"></InputNumber>
        <ValidationMessage For="()=>UserModel.Age"></ValidationMessage>
    </div>
    <div>
        <label>Photos</label>
        <InputFile multiple disabled="@isProcessing" OnChange="OnInputFileChange" />
        @if (!string.IsNullOrWhiteSpace(UploadErrorMessage))
        {
            <div>
                @UploadErrorMessage
            </div>
        }
        @if (SelectedFiles?.Count > 0)
        {
            <table>
                <thead>
                    <tr>
                        <th>Name</th>
                        <th>Size (bytes)</th>
                        <th>Last Modified</th>
                        <th>Type</th>
                    </tr>
                </thead>
                <tbody>
                    @foreach (var selectedFile in SelectedFiles)
                    {
                        <tr>
                            <td>@selectedFile.Name</td>
                            <td>@selectedFile.Size</td>
                            <td>@selectedFile.LastModified</td>
                            <td>@selectedFile.ContentType</td>
                        </tr>
                    }
                </tbody>
            </table>
        }
    </div>
    <div>
        <button disabled="@isProcessing">Create user</button>
    </div>
</EditForm>

    private void OnInputFileChange(InputFileChangeEventArgs args)
    {
        var files = args.GetMultipleFiles(maximumFileCount: 15);
        if (args.FileCount == 0 || files.Count == 0)
        {
            UploadErrorMessage = "Please select a file.";
            return;
        }

        var allowedExtensions = new List<string> { ".jpg", ".png", ".jpeg" };
        if(!files.Any(file => allowedExtensions.Contains(Path.GetExtension(file.Name), StringComparer.OrdinalIgnoreCase)))
        {
            UploadErrorMessage = "Please select .jpg/.jpeg/.png files only.";
            return;
        }

        SelectedFiles = files;
        UploadErrorMessage = string.Empty;
    }

    private async Task CreateUserAsync()
    {
        try
        {
            isProcessing = true;
            await FilesManagerService.PostModelWithFilesAsync(
                        requestUri: "api/Files/CreateUser",
                        browserFiles: SelectedFiles,
                        fileParameterName: "inputFiles",
                        model: UserModel,
                        modelParameterName: "userModel");
            UserModel = new User();
        }
        finally
        {
            isProcessing = false;
            SelectedFiles = null;
        }
    }

using System.IO;
using Microsoft.AspNetCore.Mvc;
using BlazorWasmUpload.Shared;
using Microsoft.AspNetCore.Hosting;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using System.Collections.Generic;
using Microsoft.Extensions.Logging;
using System.Text.Json;
using BlazorWasmUpload.Server.Utils;
using System.Linq;

namespace BlazorWasmUpload.Server.Controllers
{
    [ApiController]
    [Route("api/[controller]/[action]")]
    public class FilesController : ControllerBase
    {
        private const int MaxBufferSize = 0x10000;

        private readonly IWebHostEnvironment _webHostEnvironment;
        private readonly ILogger<FilesController> _logger;

        public FilesController(
            IWebHostEnvironment webHostEnvironment,
            ILogger<FilesController> logger)
        {
            _webHostEnvironment = webHostEnvironment;
            _logger = logger;
        }

        [HttpPost]
        public async Task<IActionResult> CreateUser(
            //[FromForm] string userModel, // <-- this is the actual form of the posted model
            [ModelBinder(BinderType = typeof(JsonModelBinder)), FromForm] User userModel,
            [FromForm] IList<IFormFile> inputFiles = null)
        {
            /*var user = JsonSerializer.Deserialize<User>(userModel);
            _logger.LogInformation($"userModel.Name: {user.Name}");
            _logger.LogInformation($"userModel.Age: {user.Age}");*/

            _logger.LogInformation($"userModel.Name: {userModel.Name}");
            _logger.LogInformation($"userModel.Age: {userModel.Age}");

            var uploadsRootFolder = Path.Combine(_webHostEnvironment.WebRootPath, "Files");
            if (!Directory.Exists(uploadsRootFolder))
            {
                Directory.CreateDirectory(uploadsRootFolder);
            }

            if (inputFiles?.Any() == true)
            {
                foreach (var file in inputFiles)
                {
                    if (file == null || file.Length == 0)
                    {
                        continue;
                    }

                    var filePath = Path.Combine(uploadsRootFolder, file.FileName);
                    using var fileStream = new FileStream(filePath,
                                                            FileMode.Create,
                                                            FileAccess.Write,
                                                            FileShare.None,
                                                            MaxBufferSize,
                                                            useAsync: true);
                    await file.CopyToAsync(fileStream);
                    _logger.LogInformation($"Saved file: {filePath}");
                }
            }

            return Ok();
        }
    }
}

[ModelBinder(BinderType = typeof(JsonModelBinder)), FromForm] User userModel,

using System;
using System.Text.Json;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc.ModelBinding;

namespace BlazorWasmUpload.Server.Utils
{
    public class JsonModelBinder : IModelBinder
    {
        public Task BindModelAsync(ModelBindingContext bindingContext)
        {
            if (bindingContext == null)
            {
                throw new ArgumentNullException(nameof(bindingContext));
            }

            var valueProviderResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
            if (valueProviderResult != ValueProviderResult.None)
            {
                bindingContext.ModelState.SetModelValue(bindingContext.ModelName, valueProviderResult);

                var valueAsString = valueProviderResult.FirstValue;
                var result = JsonSerializer.Deserialize(valueAsString, bindingContext.ModelType);
                if (result != null)
                {
                    bindingContext.Result = ModelBindingResult.Success(result);
                    return Task.CompletedTask;
                }
            }

            return Task.CompletedTask;
        }
    }
}

[HttpPost]
public async Task<IActionResult> CreateUser(
            [FromForm] string userModel, // <-- this is the actual form of the posted model
            [FromForm] IList<IFormFile> inputFiles = null)
{
  var user = JsonSerializer.Deserialize<User>(userModel);

public class MyClass : INotifyPropertyChanged
{
    private string _myValue;
    public event PropertyChangedEventHandler PropertyChanged;
    public string MyValue
    {
        get
        {
            return _myValue;
        }
        set
        {
            _myValue = value;
            RaisePropertyChanged("MyValue");
        }
    }
    protected void RaisePropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}

public class MyDreamClass : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;
    public string MyValue { get; set; }
}

 PM> Install-Package structuremap
PM> Install-Package Castle.Core

namespace AOP01.Services
{
    public interface ITestService
    {
        int GetCount();
    }
}

namespace AOP01.Services
{
    public class TestService: ITestService
    {     
        public int GetCount()
        {
            return 10; //این فقط یک مثال است برای بررسی تزریق وابستگی‌ها
        }
    }
}

using AOP01.Services;
using AOP01.Core;

namespace AOP01.ViewModels
{
    public class TestViewModel  : BaseViewModel
    {
        private readonly ITestService _testService;
        //تزریق وابستگی‌ها در سازنده کلاس
        public TestViewModel(ITestService testService)
        {
            _testService = testService;
        }

        // Note: it's a virtual property.
        public virtual string Text { get; set; }
    }
}

using System.ComponentModel;

namespace AOP01.Core
{
    public abstract class BaseViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        public void RaisePropertyChanged(string propertyName)
        {
            var handler = PropertyChanged;

            if (handler != null)
                handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

using System;
using Castle.DynamicProxy;

namespace AOP01.Core
{
    public class NotifyPropertyInterceptor : IInterceptor
    {
        public void Intercept(IInvocation invocation)
        {
            // متد ست، ابتدا فراخوانی می‌شود و سپس کار اطلاع رسانی را انجام خواهیم داد
            invocation.Proceed();

            if (invocation.Method.Name.StartsWith("set_"))
            {
                var propertyName = invocation.Method.Name.Substring(4);
                raisePropertyChangedEvent(invocation, propertyName, invocation.TargetType);
            }
        }

        void raisePropertyChangedEvent(IInvocation invocation, string propertyName, Type type)
        {
            var methodInfo = type.GetMethod("RaisePropertyChanged");
            if (methodInfo == null)
            {
                if (type.BaseType != null)
                    raisePropertyChangedEvent(invocation, propertyName, type.BaseType);
            }
            else
            {
                methodInfo.Invoke(invocation.InvocationTarget, new object[] { propertyName });
            }
        }
    }
}

using System.Linq;
using System.Windows;
using AOP01.Core;
using AOP01.Services;
using Castle.DynamicProxy;
using StructureMap;

namespace AOP01
{
    public partial class App
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            base.OnStartup(e);

            ObjectFactory.Initialize(x =>
            {
                x.For<ITestService>().Use<TestService>();

                var dynamicProxy = new ProxyGenerator();
                x.For<BaseViewModel>().EnrichAllWith(vm =>
                {
                    var constructorArgs = vm.GetType()
                            .GetConstructors()
                            .FirstOrDefault()
                            .GetParameters()
                            .Select(p => ObjectFactory.GetInstance(p.ParameterType))
                            .ToArray();

                    return dynamicProxy.CreateClassProxy(
                                classToProxy: vm.GetType(),
                                constructorArguments: constructorArgs,
                                interceptors: new[] { new NotifyPropertyInterceptor() });
                });
            });
        }
    }
}

<Window x:Class="AOP01.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <TextBox Text="{Binding Text, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
    </Grid>
</Window>

using AOP01.ViewModels;
using StructureMap;

namespace AOP01
{
    public partial class MainWindow
    {
        public MainWindow()
        {
            InitializeComponent();

            //علاوه بر تشکیل پروکسی
            //کار وهله سازی و تزریق وابستگی‌ها در سازنده را هم به صورت خودکار انجام می‌دهد
            var vm = ObjectFactory.GetInstance<TestViewModel>(); 
            this.DataContext = vm;
        }
    }
}

public class User
{
    public int Id { set; get; }
    public string Name { set; get; }
    public DateTime RegistrationDate { set; get; }
}

public class UserViewModel
{
    public int Id { set; get; }
    public string Name { set; get; }
    public string RegistrationDate { set; get; }
}

public class DateTimeToPersianDateTimeConverter : ITypeConverter<DateTime, string>
{
    private readonly string _separator;
    private readonly bool _includeHourMinute;
 
    public DateTimeToPersianDateTimeConverter(string separator = "/", bool includeHourMinute = true)
    {
        _separator = separator;
        _includeHourMinute = includeHourMinute;
    }
 
    public string Convert(ResolutionContext context)
    {
        var objDateTime = context.SourceValue;
        return objDateTime == null ? string.Empty : toShamsiDateTime((DateTime)context.SourceValue);
    }
 
    private string toShamsiDateTime(DateTime info)
    {
        var year = info.Year;
        var month = info.Month;
        var day = info.Day;
        var persianCalendar = new PersianCalendar();
        var pYear = persianCalendar.GetYear(new DateTime(year, month, day, new GregorianCalendar()));
        var pMonth = persianCalendar.GetMonth(new DateTime(year, month, day, new GregorianCalendar()));
        var pDay = persianCalendar.GetDayOfMonth(new DateTime(year, month, day, new GregorianCalendar()));
        return _includeHourMinute ?
            string.Format("{0}{1}{2}{1}{3} {4}:{5}", pYear, _separator, pMonth.ToString("00", CultureInfo.InvariantCulture), pDay.ToString("00", CultureInfo.InvariantCulture), info.Hour.ToString("00"), info.Minute.ToString("00"))
            : string.Format("{0}{1}{2}{1}{3}", pYear, _separator, pMonth.ToString("00", CultureInfo.InvariantCulture), pDay.ToString("00", CultureInfo.InvariantCulture));
    } 
}

public class TestProfile1 : Profile
{
    protected override void Configure()
    {
        // این تنظیم سراسری هست و به تمام خواص زمانی اعمال می‌شود
        this.CreateMap<DateTime, string>().ConvertUsing(new DateTimeToPersianDateTimeConverter()); 
        this.CreateMap<User, UserViewModel>();
     }
 
    public override string ProfileName
    {
        get { return this.GetType().Name; }
    }
}

Mapper.Initialize(cfg => // In Application_Start()
{
     cfg.AddProfile<TestProfile1>();
});

var dbUser1 = new User
{
    Id = 1,
    Name = "Test",
    RegistrationDate = DateTime.Now.AddDays(-10)
};
 
var uiUser = new UserViewModel();

Mapper.Map(source: dbUser1, destination: uiUser);

this.CreateMap<User, UserViewModel>()
             .ForMember(userViewModel => userViewModel.RegistrationDate,
                        opt => opt.ResolveUsing(src =>
                        {
                             var dt = src.RegistrationDate;
                             return dt.ToShortDateString();
                        }));

var configurationStore = new ConfigurationStore(new TypeMapFactory(), MapperRegistry.Mappers);
configurationStore.AddProfile<TestProfile1>();
var mapper = new MappingEngine(configurationStore);
mapper.Map(source: dbUser1, destination: uiUser);

using System;
using System.Linq;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Data.Entity.ModelConfiguration;

namespace Sample
{
    public class BlogPost
    {
        public int Id { set; get; }

        [StringLength(maximumLength: 450, MinimumLength = 1), Required]
        public string Title { set; get; }

        [MaxLength]
        public string Body { set; get; }

        public virtual ICollection<Tag> Tags { set; get; } // many-to-many

        public BlogPost()
        {
            Tags = new List<Tag>();
        }
    }

    public class Tag
    {
        public int Id { set; get; }

        [StringLength(maximumLength: 450), Required]
        public string Name { set; get; }

        public virtual ICollection<BlogPost> BlogPosts { set; get; } // many-to-many

        public Tag()
        {
            BlogPosts = new List<BlogPost>();
        }
    }

    public class MyContext : DbContext
    {
        public DbSet<BlogPost> BlogPosts { get; set; }
        public DbSet<Tag> Tags { get; set; }
    }

    public class Configuration : DbMigrationsConfiguration<MyContext>
    {
        public Configuration()
        {
            AutomaticMigrationsEnabled = true;
            AutomaticMigrationDataLossAllowed = true;
        }

        protected override void Seed(MyContext context)
        {
            var tag1 = new Tag { Name = "Tag1" };
            context.Tags.Add(tag1);

            var post1 = new BlogPost { Title = "Title...1", Body = "Body...1" };
            context.BlogPosts.Add(post1);

            post1.Tags.Add(tag1);

            base.Seed(context);
        }
    }

    public static class Test
    {
        public static void RunTests()
        {
            Database.SetInitializer(new MigrateDatabaseToLatestVersion<MyContext, Configuration>());

            using (var ctx = new MyContext())
            {
                var post1 = ctx.BlogPosts.Find(1);
                if (post1 != null)
                {
                    Console.WriteLine(post1.Title);
                }
            }
        }
    }
}

    public class TagMap : EntityTypeConfiguration<Tag>
    {
        public TagMap()
        {
            this.HasMany(x => x.BlogPosts)
                .WithMany(x => x.Tags)
                .Map(map =>
                    {
                        map.MapLeftKey("TagId");
                        map.MapRightKey("BlogPostId");
                        map.ToTable("BlogPostsJoinTags");
                    });
        }
    }

    public class MyContext : DbContext
    {
        public DbSet<BlogPost> BlogPosts { get; set; }
        public DbSet<Tag> Tags { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Configurations.Add(new TagMap());
            base.OnModelCreating(modelBuilder);
        }
    }

            using (var ctx = new MyContext())
            {
                var post1 = ctx.BlogPosts.Find(1);
                if (post1 != null)
                {
                    Console.WriteLine(post1.Title);
                    foreach (var tag in post1.Tags.ToList())
                        post1.Tags.Remove(tag);
                    ctx.SaveChanges();
                }
            }

                var post1 = ctx.BlogPosts.Find(1);
                if (post1 != null)
                {
                    ctx.BlogPosts.Remove(post1);
                    ctx.SaveChanges();
                }

                var post1 = ctx.BlogPosts.Find(1);
                if (post1 != null)
                {
                    var tag2 = new Tag { Name = "Tag2" };                    
                    post1.Tags.Add(tag2);
                    ctx.SaveChanges();
                }

                //نام تگ‌های دریافتی از کاربر  
                var tagsList = new[] { "Tag1", "Tag2", "Tag3" };

                //بارگذاری یک مطلب به همراه تگ‌های آن
                var post1 = ctx.BlogPosts.Include(x => x.Tags).FirstOrDefault(x => x.Id == 1);
                if (post1 != null)
                {
                    //ابتدا کلیه تگ‌های موجود را حذف خواهیم کرد
                    if (post1.Tags != null && post1.Tags.Any())
                        post1.Tags.Clear();

                    //سپس در طی فقط یک کوئری بررسی می‌کنیم کدامیک از موارد ارسالی موجود هستند
                    var listOfActualTags = ctx.Tags.Where(x => tagsList.Contains(x.Name)).ToList();
                    var listOfActualTagNames = listOfActualTags.Select(x => x.Name.ToLower()).ToList();

                    //فقط موارد جدید به تگ‌ها و ارتباطات موجود اضافه می‌شوند
                    foreach (var tag in tagsList)
                    {
                        if (!listOfActualTagNames.Contains(tag.ToLowerInvariant().Trim()))
                        {
                            ctx.Tags.Add(new Tag { Name = tag.Trim() });
                        }
                    }
                    ctx.SaveChanges(); // ثبت موارد جدید

                    //موارد قبلی هم حفظ می‌شوند
                    foreach (var item in listOfActualTags)
                    {
                        post1.Tags.Add(item);
                    }
                    ctx.SaveChanges();
                }

SELECT
[Extent1].[Id] AS [Id],
[Extent1].[Name] AS [Name]
FROM [dbo].[Tags] AS [Extent1]
WHERE [Extent1].[Name] IN (N'Tag1',N'Tag2',N'Tag3')

 ctx.BlogPosts.Where(p => p.Id == 1).Include(p => p.Tags).FirstOrDefault()

var posts = from p in ctx.BlogPosts
                 from t in p.Tags
                 where t.Name == "Tag1"
                 select p;

 var posts = ctx.Tags.Where(x => x.Name == "Tag1").SelectMany(x => x.BlogPosts);

public void ConfigureServices(IServiceCollection services)
{
   services.AddMvc();
   services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
}

public IActionResult ProcessForm()
{
   HttpContext.Items["firstname"] = "Vahid";
   HttpContext.Items["lastname"] = "N.";
   return View();
}

public class MyHelperClass
{
    private readonly IHttpContextAccessor _contextAccessor;
    public MyHelperClass(IHttpContextAccessor  contextAccessor)
    {
        _contextAccessor = contextAccessor;
    }

    public string DoWork()
    {
        string firstName = _contextAccessor.HttpContext.Items["firstname"].ToString();
        string lastName = _contextAccessor.HttpContext.Items["lastname"].ToString();
        return $"Hello {firstName} {lastName}!";
    }
}

services.AddOptions<BearerTokensOptions>()
           .Bind(configuration.GetSection("BearerTokens"))
           .Validate(bearerTokens =>
          {
                 return bearerTokens.AccessTokenExpirationMinutes < bearerTokens.RefreshTokenExpirationMinutes;
          }, "RefreshTokenExpirationMinutes is less than AccessTokenExpirationMinutes. Obtaining new tokens using the refresh token should happen only if the access token has expired.");

{
  "ApiSettings": {
    "AllowedEndpoints": [
      {
        "Name": "Service 1",
        "Timeout": 30,
        "Url": "http://service1.site.com"
      },
      {
        "Name": "Service 2",
        "Timeout": 10,
        "Url": "https://service2.site.com"
      }
    ]
  }
}

using System;
using System.Collections.Generic;

namespace FluentValidationSample.Models
{
    public class AllowedEndpoint
    {
        public string Name { get; set; }
        public int Timeout { get; set; }
        public Uri Url { get; set; }
    }

    public class ApiSettings
    {
        public IEnumerable<AllowedEndpoint> AllowedEndpoints { get; set; }
    }
}

namespace FluentValidationSample.Web
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<ApiSettings>(Configuration.GetSection(nameof(ApiSettings)));

using System;
using System.Linq;
using FluentValidation;
using FluentValidationSample.Models;

namespace FluentValidationSample.ModelsValidations
{
    public class ApiSettingsValidator : AbstractValidator<ApiSettings>
    {
        public ApiSettingsValidator()
        {
            RuleFor(apiSetting => apiSetting).NotNull()
            .WithMessage("مدخل ApiSettings تعریف نشده‌است.");

            RuleFor(apiSetting => apiSetting.AllowedEndpoints).NotNull().NotEmpty()
            .WithMessage("مدخل AllowedEndpoints تعریف نشده‌است.");

            When(apiSetting => apiSetting.AllowedEndpoints != null,
            () =>
                {
                    RuleFor(apiSetting => apiSetting.AllowedEndpoints)
                        .Must(endpoints => endpoints.GroupBy(endpoint => endpoint.Name).Count() == endpoints.Count())
                        .WithMessage("نام‌های سرویس‌ها باید منحصربفرد باشند.");

                    RuleFor(apiSetting => apiSetting.AllowedEndpoints)
                        .Must(endpoints => !endpoints.Any(endpoint => endpoint.Timeout > 90 || endpoint.Timeout < 1))
                        .WithMessage("مقدار timeout باید بین 1 و 90 باشد");

                    RuleFor(apiSetting => apiSetting.AllowedEndpoints)
                        .Must(endpoints => endpoints.GroupBy(endpoint => endpoint.Url.ToString().ToLower()).Count() == endpoints.Count())
                        .WithMessage("آدرس‌های سرویس‌ها باید منحصربفرد باشند.");

                    RuleFor(apiSetting => apiSetting.AllowedEndpoints)
                        .Must(endpoints => endpoints.All(endpoint => endpoint.Url.Scheme.Equals("https", StringComparison.CurrentCultureIgnoreCase)))
                        .WithMessage("تمام آدرس‌ها باید HTTPS باشند.");
                });
        }
    }
}

services.AddOptions<BearerTokensOptions>()
           .Bind(configuration.GetSection("BearerTokens"))
           .Validate(bearerTokens =>
          {
                 return bearerTokens.AccessTokenExpirationMinutes < bearerTokens.RefreshTokenExpirationMinutes;
          }, "RefreshTokenExpirationMinutes is less than AccessTokenExpirationMinutes. Obtaining new tokens using the refresh token should happen only if the access token has expired.");

namespace Microsoft.Extensions.Options
{
    public interface IValidateOptions<TOptions> where TOptions : class
    {
        ValidateOptionsResult Validate(string name, TOptions options);
    }
}

using System.Linq;
using FluentValidation;
using Microsoft.Extensions.Options;

namespace FluentValidationSample.ModelsValidations
{
    public class AppConfigValidator<TOptions> : IValidateOptions<TOptions> where TOptions : class
    {
        private readonly IValidator<TOptions> _validator;

        public AppConfigValidator(IValidator<TOptions> validator)
        {
            _validator = validator;
        }

        public ValidateOptionsResult Validate(string name, TOptions options)
        {
            if (options is null)
            {
                return ValidateOptionsResult.Fail("Configuration object is null.");
            }

            var validationResult = _validator.Validate(options);
            return validationResult.IsValid
                ? ValidateOptionsResult.Success
                : ValidateOptionsResult.Fail(validationResult.Errors.Select(error => error.ToString()));
        }
    }
}

namespace FluentValidationSample.Web
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<ApiSettings>(Configuration.GetSection(nameof(ApiSettings)));
            services.AddTransient<IValidateOptions<ApiSettings>, AppConfigValidator<ApiSettings>>();

namespace FluentValidationSample.Web.Controllers
{
    public class HomeController : Controller
    {
        private readonly IUsersService _usersService;
        private readonly ApiSettings _apiSettings;

        public HomeController(IUsersService usersService, IOptions<ApiSettings> apiSettings)
        {
            _usersService = usersService;
            _apiSettings = apiSettings.Value;
        }

An unhandled exception occurred while processing the request.
OptionsValidationException: تمام آدرس‌ها باید HTTPS باشند.