namespace ConsoleApplicationTest
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("0172942284 => {0}", "0172942284".IsValidNationalCode());
            Console.WriteLine("1000000001 => {0}", "1000000001".IsValidNationalCode());
        }
    }

    public static class Helpers
    {
        public static Boolean IsValidNationalCode(this String nationalCode)
        {
            if (String.IsNullOrEmpty(nationalCode))
                throw new Exception("لطفا کد ملی را صحیح وارد نمایید");

            if (nationalCode.Length != 10)
                throw new Exception("طول کد ملی باید ده کاراکتر باشد");

            var regex = new Regex(@"[^0-9] ");
            if (!regex.IsMatch(nationalCode))
                throw new Exception("کد ملی تشکیل شده از ده رقم عددی می‌باشد؛ لطفا کد ملی را صحیح وارد نمایید");

            if (!Regex.IsMatch(nationalCode, @"^(?!(\d)\1{9})\d{10}$"))
                return false;

            var check = Convert.ToInt32(nationalCode.Substring(9, 1));
            var result = Enumerable.Range(0, 9)
                .Select(x => Convert.ToInt32(nationalCode.Substring(x, 1)) * (10 - x))
                .Sum() % 11;

            int remainder = result % 11;
            return check == (remainder < 2 ? remainder : 11 - remainder);

        }
    }
}

Refused to execute script from '<URL>' because its MIME type ('') is not executable, and strict MIME type checking is enabled.

var provider = new FileExtensionContentTypeProvider();
app.UseStaticFiles(new StaticFileOptions
{
    ContentTypeProvider = provider
});

namespace SymantecUpdateDownloader
{
    using System;
    using System.IO;
    using Quartz;
    using Quartz.Impl;
    using System.Globalization;
    public class TestJob : IJob
    {
        public void Execute(IJobExecutionContext context)
        {
            new Download().Scraping();
        }
    }
    public interface ISchedule
    {
        void Run();
    }
    public class TestSchedule : ISchedule
    {
        public void Run()
        {
            
            DateTimeOffset startTime = DateBuilder.FutureDate(2, IntervalUnit.Second);

            IJobDetail job = JobBuilder.Create<HelloJob>()
                                       .WithIdentity("job1")
                                       .Build();

            ITrigger trigger = TriggerBuilder.Create()
                                             .WithIdentity("trigger1")
                                             .StartAt(startTime)
                                             .WithDailyTimeIntervalSchedule(x => x.OnEveryDay().StartingDailyAt(new TimeOfDay(7, 0)).WithRepeatCount(0))
                                             .Build();

            ISchedulerFactory sf = new StdSchedulerFactory();
            IScheduler sc = sf.GetScheduler();
            sc.ScheduleJob(job, trigger);

            sc.Start();
        }
    }
}

public class Download
    {
        static WebClient wc = new WebClient();
        static ManualResetEvent handle = new ManualResetEvent(true);
        
        private DateTime myDate = new DateTime();
        public void Scraping()
        {
            using (WebClient client = new WebClient())
            {
                client.Encoding = System.Text.Encoding.UTF8;
                var doc = new HtmlAgilityPack.HtmlDocument();
                ArrayList result = new ArrayList();
                doc.LoadHtml(client.DownloadString("https://www.symantec.com/security_response/definitions/download/detail.jsp?gid=savce"));
                var tasks = new List<Task>();
                foreach (var href in doc.DocumentNode.Descendants("a").Select(x => x.Attributes["href"]))
                {
                    if (href == null) continue;
                    string s = href.Value;
                    Match m = Regex.Match(s, @"http://definitions.symantec.com/defs/(\d{8}-\d{3}-v5i(32|64)\.exe)");
                    if (m.Success)
                    {
                        Match date = Regex.Match(m.Value, @"(\d{4})(\d{2})(\d{2})");
                        Match filename = Regex.Match(m.Value, @"\d{8}-\d{3}-v5i(32|64)\.exe");
                        int year = Int32.Parse(date.Groups[0].Value);
                        int month = Int32.Parse(date.Groups[1].Value);
                        int day = Int32.Parse(date.Groups[3].Value);

                        myDate = new DateTime(
                                Int32.Parse(date.Groups[1].Value),
                                Int32.Parse(date.Groups[2].Value),
                                Int32.Parse(date.Groups[3].Value));
                        if (myDate == DateTime.Today)
                        {
                            tasks.Add(DownloadUpdate(m.Value, filename.Value));
                        }
                        else
                        {
                            MessageBox.Show("امروز آپدیت موجود نیست");
                        }
                    }
                }
                DownloadTask = Task.WhenAll(tasks);
            }
        }
        private static Task DownloadTask;
        private Task DownloadUpdate(string url, string fileName)
        {
            var wc = new WebClient();
            return wc.DownloadFileTaskAsync(new Uri(url), @"\\10.1.0.15\SymantecUpdate\\" + fileName);
        }

    }

http://definitions.symantec.com/defs/20130622-007-v5i32.exe

http://definitions.symantec.com/defs/20130622-007-v5i64.exe

(\d{8}-\d{3}-v5i(32|64)\.exe)

int year = Int32.Parse(date.Groups[0].Value);
int month = Int32.Parse(date.Groups[1].Value);
int day = Int32.Parse(date.Groups[3].Value);

using System.ComponentModel.DataAnnotations;

namespace NotifyPropertyChangedGenerator.Demo;

public enum Gender
{
    NotSpecified,
    [Display(Name = "مرد")] Male,
    [Display(Name = "زن")] Female
}

public static class Extensions
{
    public static string GetDisplayName(this Enum value)
    {
        if (value is null)
            throw new ArgumentNullException(nameof(value));

        var attribute = value.GetType().GetField(value.ToString())?
            .GetCustomAttributes<DisplayAttribute>(false).FirstOrDefault();

        if (attribute is null)
            return value.ToString();

        return attribute.GetType().GetProperty("Name")?.GetValue(attribute, null)?.ToString();
    }
}

namespace NotifyPropertyChangedGenerator.Demo
{
  public static class GenderExtensions
  {
      public static string GetDisplayName(this Gender @enum)
      {
          return @enum switch
            {
                Gender.NotSpecified => "NotSpecified",
                Gender.Male => "مرد",
                Gender.Female => "زن",
                _ => throw new ArgumentOutOfRangeException(nameof(@enum))
            };
      }
  }
}

[Generator]
public class EnumExtensionsGenerator : ISourceGenerator
{
    public void Initialize(GeneratorInitializationContext context)
    {}

    public void Execute(GeneratorExecutionContext context)
    {
        var compilation = context.Compilation;
        foreach (var syntaxTree in compilation.SyntaxTrees)
        {
            var semanticModel = compilation.GetSemanticModel(syntaxTree);
            var immutableHashSet = syntaxTree.GetRoot()
                .DescendantNodesAndSelf()
                .OfType<EnumDeclarationSyntax>()
                .Select(enumDeclarationSyntax => semanticModel.GetDeclaredSymbol(enumDeclarationSyntax))
                .OfType<ITypeSymbol>()
                /*.Where(typeSymbol => typeSymbol.GetAttributes().Any(
                    attributeData => string.Equals(attributeData.AttributeClass?.Name, "GenerateExtensions",
                        StringComparison.Ordinal)
                ))*/
                .ToImmutableHashSet();

            foreach (var typeSymbol in immutableHashSet)
            {
                var source = GenerateEnumExtensions(typeSymbol);
                context.AddSource($"{typeSymbol.Name}Extensions.cs", source);
            }
        }
    }

    private string GenerateEnumExtensions(ITypeSymbol typeSymbol)
    {
        return $@"namespace {typeSymbol.ContainingNamespace}
{{
  public static class {typeSymbol.Name}Extensions
  {{
      public static string GetDisplayName(this {typeSymbol.Name} @enum)
      {{
          {GenerateExtensionMethodBody(typeSymbol)}
      }}
  }}
}}";
    }

    private static string GenerateExtensionMethodBody(ITypeSymbol typeSymbol)
    {
        var sb = new StringBuilder();
        sb.Append(@"return @enum switch
            {
");

        foreach (var fieldSymbol in typeSymbol.GetMembers().OfType<IFieldSymbol>())
        {
            var displayAttribute = fieldSymbol.GetAttributes()
                .FirstOrDefault(attributeData =>
                    string.Equals(attributeData.AttributeClass?.Name, "DisplayAttribute", StringComparison.Ordinal));
            if (displayAttribute is null)
            {                
                sb.AppendLine(
                    $@"                {typeSymbol.Name}.{fieldSymbol.Name} => ""{fieldSymbol.Name}"",");
            }
            else
            {
                var displayAttributeName = displayAttribute.NamedArguments
                    .FirstOrDefault(x => string.Equals(x.Key, "Name", StringComparison.Ordinal))
                    .Value;
                sb.AppendLine(
                    $@"                {typeSymbol.Name}.{fieldSymbol.Name} => ""{displayAttributeName.Value}"",");
            }
        }

        sb.Append(
            @"                _ => throw new ArgumentOutOfRangeException(nameof(@enum))
            };");

        return sb.ToString();
    }

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net6.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>

    <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
    <CompilerGeneratedFilesOutputPath>Generated</CompilerGeneratedFilesOutputPath>
  </PropertyGroup>
  
  <Target Name="CleanSourceGeneratedFiles" BeforeTargets="BeforeBuild" DependsOnTargets="$(BeforeBuildDependsOn)">
    <RemoveDir Directories="$(CompilerGeneratedFilesOutputPath)" />
  </Target>  
  <ItemGroup>
    <!-- Exclude the output of source generators from the compilation -->
    <Compile Remove="$(CompilerGeneratedFilesOutputPath)/**/*.cs" />
<Content Include="$(CompilerGeneratedFilesOutputPath)/**" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\NotifyPropertyChangedGenerator\NotifyPropertyChangedGenerator.csproj" 
OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
  </ItemGroup>
</Project>

{BaseIntermediateOutpath}/generated/{Assembly}/{SourceGeneratorName}/{GeneratedFile}

using System.Diagnostics;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;

namespace PDFAttachment
{
    class Program
    {
        static void Main(string[] args)
        {
            using (var pdfDoc = new Document(PageSize.A4))
            {
                var pdfWriter = PdfWriter.GetInstance(pdfDoc, new FileStream("Test.pdf", FileMode.Create));                
                pdfDoc.Open();

                pdfDoc.Add(new Phrase("Test"));

                var fs = PdfFileSpecification.FileEmbedded(pdfWriter, @"C:\path\logo.png", "logo.png", null);
                pdfWriter.AddFileAttachment("توضیحات",fs);
            }

            Process.Start("Test.pdf");
        }
    }
}

• قسمت modified مقدار دهی نشده است.
• پنل مربوط به پیوست‌ها باید دستی باز شود.

using System.Diagnostics;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;

namespace PDFAttachment
{
    class Program
    {
        static void Main(string[] args)
        {
            using (var pdfDoc = new Document(PageSize.A4))
            {
                var pdfWriter = PdfWriter.GetInstance(pdfDoc, new FileStream("Test.pdf", FileMode.Create));                
                pdfDoc.Open();

                pdfDoc.Add(new Phrase("Test"));

                var filePath = @"C:\path\logo.png";
                var fileInfo = new FileInfo(filePath);
                var pdfDictionary = new PdfDictionary();
                pdfDictionary.Put(PdfName.MODDATE, new PdfDate(fileInfo.LastWriteTime));
                var fs = PdfFileSpecification.FileEmbedded(pdfWriter, filePath, fileInfo.Name, null, true, null, pdfDictionary);
                pdfWriter.AddFileAttachment("توضیحات", fs);
            }

            Process.Start("Test.pdf");
        }
    }
}

pdfWriter.ViewerPreferences = PdfWriter.PageModeUseAttachments;

using System.Diagnostics;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;

namespace PDFAttachment
{
    class Program
    {
        static void Main(string[] args)
        {
            var reader = new PdfReader("Test.pdf");
            using (var stamper = new PdfStamper(reader, new FileStream("newTest.pdf", FileMode.Create)))
            {
                var filePath = @"C:\path\logo.png";
                addAttachment(stamper, filePath, "توضیحات");
                stamper.Close();
            }

            Process.Start("newTest.pdf");
        }

        private static void addAttachment(PdfStamper stamper, string filePath, string description)
        {
            var fileInfo = new FileInfo(filePath);
            var pdfDictionary = new PdfDictionary();
            pdfDictionary.Put(PdfName.MODDATE, new PdfDate(fileInfo.LastWriteTime));
            var pdfWriter = stamper.Writer;
            var fs = PdfFileSpecification.FileEmbedded(pdfWriter, filePath, fileInfo.Name, null, true, null, pdfDictionary);
            stamper.AddFileAttachment(description, fs);
        }
    }
}