PM> Install-Package Saltarelle.Compiler
PM> Install-Package Saltarelle.Runtime

copy "$(TargetDir)$(TargetName).js" "$(SolutionDir)SalratelleSample.UI\Scripts"

<script src="~/Scripts/SaltarelleSample.Client.js"></script>

<script src="~/Scripts/mscorlib.min.js"></script>
<script src="~/Scripts/SaltarelleSample.Client.js"></script>

> Install-Package Saltarelle.Web
> Install-Package Saltarelle.jQuery

<script src="~/Scripts/jquery-1.10.2.min.js"></script>

public class Feed
    {
        public string FeedId { get; set; }
        public string Title { get; set; }
        public string Address { get; set; }

    }
    public class Item
    {
        public string Title { get; set; }
        public string Link { get; set; }
        public string Description { get; set; }
    }

 public class SiteManager
    {
        private static List<Feed> _feeds;
        public static List<Feed> Feeds
        {
            get
            {
                if (_feeds == null)
                    _feeds = CreateSites();
                return _feeds;
            }
        }
        private static List<Feed> CreateSites()
        {
            return new List<Feed>() { 
                new Feed(){
                    FeedId = "1",
                    Title = "آخرین تغییرات سایت",
                    Address = "https://www.dntips.ir/rss.xml"
                },
                 new Feed(){
                    FeedId = "2",
                    Title = "مطالب سایت",
                    Address = "https://www.dntips.ir/feeds/posts"
                },
                 new Feed(){
                    FeedId = "3",
                    Title = "نظرات سایت",
                    Address = "https://www.dntips.ir/feeds/comments"
                },
                 new Feed(){
                    FeedId = "4",
                    Title = "خلاصه اشتراک ها",
                    Address = "https://www.dntips.ir/feed/news"
                },
            };
        }

        public static IEnumerable<Item> GetNews(string id)
        {
            XDocument feedXML = XDocument.Load(Feeds.Find(s=> s.FeedId == id).Address);
            var feeds = from feed in feedXML.Descendants("item")
                        select new Item
                        {
                            Title = feed.Element("title").Value,
                            Link = feed.Element("link").Value,
                            Description = feed.Element("description").Value
                        };
            return feeds;
        }

    }

public class FeedController : ApiController  
{
        // GET api/<controller>
        public IEnumerable<Feed> Get()
        {
            return SiteManager.Feeds;
        }
    }

public class ItemsController : ApiController
    {
        // GET api/<controller>/5
        public IEnumerable<Item> Get(string id)
        {
            return SiteManager.GetNews(id);
        }
    }

<div>
    <div>
        <h2>Feeds</h2>
        <ul id="Feeds">
           
        </ul>
    </div>
    <div>
        <h2>Items</h2>
        <p id="FeedItems">
        </p>
    </div>
   
</div>

static void Main()
        {
            jQuery.OnDocumentReady(() => {
                FillFeeds();
            });
        }

$SaltarelleSample_Client_$Program.$main = function() {
$(function() {
$SaltarelleSample_Client_$Program.$fillFeeds();
});
};
$SaltarelleSample_Client_$Program.$main();

private static void FillFeeds()
        {
            jQuery.Ajax(new jQueryAjaxOptions()
            {
                Url = "/api/feed",
                Type = "GET",
                Success = (d,t,r) => {

                    // Fill 
                    var ul = jQuery.Select("#Feeds");
                    jQuery.Each((List<Feed>)d, (idx,i) => {
                        var li = jQuery.Select("<li>").Text(i.Title).CSS("cursor", "pointer");
                        li.Click(eve => {
                            FillData(i.FeedId);
                        });
                        ul.Append(li);
                    });
                }
            });
        }

public delegate void AjaxRequestCallback(object data, string textStatus, jQueryXmlHttpRequest request);

 [PreserveMemberCase()]
    public class Feed
    {
        //[ScriptName("FeedId")]
        public string FeedId;

        //[ScriptName("Title")]
        public string Title;

        //[ScriptName("Address")]
        public string Address;

    }

    [PreserveMemberCase()]
    public class Item
    {
        // [ScriptName("Title")]
        public string Title;

        // [ScriptName("Link")]
        public string Link;

        // [ScriptName("Description")]
        public string Description;
    }

jQuery.Each((List<Feed>)d, (idx,i) => {
                        var li = jQuery.Select("<li>").Text(i.Title).CSS("cursor", "pointer");
                        li.Click(eve => {
                            FillData(i.FeedId);
                        });
                        ul.Append(li);
                    });

به ازای هر آیتمی که در شیء بازگشتی وجود دارد، با استفاد از متد each در jQuery یک li ایجاد می‌کنیم. همان طور که می‌بینید کلیه خواص، به شکل Fluent قابل اضافه شدن می‌باشد. سپس برای li یک رویداد کلیک که در صورت وقوع، متد FillData را با شناسه فید کلیک شده فراخوانی می‌کند و در آخر li را به المنت ul اضافه می‌کنیم.

برای هر کلیک هم مانند مثال بالا api را با شناسه‌ی فید مربوطه فراخوانی کرده و به ازای هر آیتم، یک سطر ایجاد می‌کنیم.

private static void FillData(string p)
        {
            jQuery.Ajax(new jQueryAjaxOptions()
            {
                Url = "/api/items/" + p,
                Type = "GET",
                Success = (d, t, r) => {
                    var content = jQuery.Select("#FeedItems");
                    content.Html("");
                    foreach (var item in (List<Item>)d)
                    {
                        var row = jQuery.Select("<div>").AddClass("row").CSS("direction", "rtl");
                        var link = jQuery.Select("<a>").Attribute("href", item.Link).Text(item.Title);
                        row.Append(link);
                        content.Append(row);
                    }
                }
            });
        }

using System;
using System.Collections.Generic;
using PdfReportSamples.Models;
using PdfRpt.Core.Contracts;
using PdfRpt.Core.Helper;
using PdfRpt.FluentInterface;

namespace PdfReportSamples.CalculatedFields
{
    public class CalculatedFieldsPdfReport
    {
        public IPdfReportData CreatePdfReport()
        {
            return new PdfReport().DocumentPreferences(doc =>
            {
                doc.RunDirection(PdfRunDirection.RightToLeft);
                doc.Orientation(PageOrientation.Portrait);
                doc.PageSize(PdfPageSize.A4);
                doc.DocumentMetadata(new DocumentMetadata { Author = "Vahid", Application = "PdfRpt", Keywords = "Test", Subject = "Test Rpt", Title = "Test" });
            })
             .DefaultFonts(fonts =>
             {
                 fonts.Path(AppPath.ApplicationPath + "\\fonts\\irsans.ttf",
                            Environment.GetEnvironmentVariable("SystemRoot") + "\\fonts\\verdana.ttf");
             })
             .PagesFooter(footer =>
             {
                 footer.DefaultFooter(printDate: DateTime.Now.ToString("MM/dd/yyyy"));
             })
             .PagesHeader(header =>
             {
                 header.DefaultHeader(defaultHeader =>
                 {
                     defaultHeader.ImagePath(AppPath.ApplicationPath + "\\Images\\01.png");
                     defaultHeader.Message("گزارش جدید ما");
                 });
             })
             .MainTableTemplate(template =>
             {
                 template.BasicTemplate(BasicTemplate.RainyDayTemplate);
             })
             .MainTablePreferences(table =>
             {
                 table.ColumnsWidthsType(TableColumnWidthType.Relative);
             })
             .MainTableDataSource(dataSource =>
             {
                 var listOfRows = new List<User>();
                 for (int i = 0; i < 220; i++)
                 {
                     listOfRows.Add(new User { Id = i, LastName = "نام خانوادگی " + i, Name = "نام " + i, Balance = i + 1000 });
                 }
                 dataSource.StronglyTypedList<User>(listOfRows);
             })
             .MainTableEvents(events =>
             {
                 events.DataSourceIsEmpty(message: "رکوردی یافت نشد.");
             })
             .MainTableSummarySettings(summary =>
             {
                 summary.OverallSummarySettings("جمع");
                 summary.PreviousPageSummarySettings("نقل از صفحه قبل");
                 summary.PageSummarySettings("جمع صفحه");
             })
             .MainTableColumns(columns =>
             {
                 columns.AddColumn(column =>
                 {
                     column.PropertyName("rowNo");
                     column.IsRowNumber(true);
                     column.CellsHorizontalAlignment(HorizontalAlignment.Center);
                     column.IsVisible(true);
                     column.Order(0);
                     column.Width(1);
                     column.HeaderCell("ردیف", captionRotation: 90);
                 });

                 columns.AddColumn(column =>
                 {
                     column.PropertyName<User>(x => x.Id);
                     column.CellsHorizontalAlignment(HorizontalAlignment.Center);
                     column.IsVisible(true);
                     column.Order(1);
                     column.Width(2);
                     column.HeaderCell("شماره");
                 });

                 columns.AddColumn(column =>
                 {
                     column.PropertyName<User>(x => x.Name);
                     column.CellsHorizontalAlignment(HorizontalAlignment.Center);
                     column.IsVisible(true);
                     column.Order(2);
                     column.Width(2);
                     column.HeaderCell("نام");
                 });

                 columns.AddColumn(column =>
                 {
                     column.PropertyName<User>(x => x.LastName);
                     column.CellsHorizontalAlignment(HorizontalAlignment.Center);
                     column.IsVisible(true);
                     column.Order(3);
                     column.Width(3);
                     column.HeaderCell("نام خانوادگی");
                 });

                 columns.AddColumn(column =>
                 {
                     column.PropertyName("CF1");
                     column.CalculatedField(true,
                         list =>
                         {
                             if (list == null) return string.Empty;
                             var name = list.GetSafeStringValueOf<User>(x => x.Name);
                             var lastName = list.GetSafeStringValueOf<User>(x => x.LastName);
                             return name + " - " + lastName;
                         });
                     column.HeaderCell("ف.م.");
                     column.Width(3);
                     column.CellsHorizontalAlignment(HorizontalAlignment.Center);
                     column.IsVisible(true);
                     column.Order(4);
                 });

                 columns.AddColumn(column =>
                 {
                     column.PropertyName<User>(x => x.Balance);
                     column.HeaderCell("موجودی");
                     column.ColumnItemsTemplate(template =>
                     {
                         template.TextBlock();
                         template.DisplayFormatFormula(obj => obj == null ? string.Empty : string.Format("{0:n0}", obj));
                     });
                     column.Width(2);
                     column.AggregateFunction(aggregateFunction =>
                     {
                         aggregateFunction.NumericAggregateFunction(AggregateFunction.Sum);
                         aggregateFunction.DisplayFormatFormula(obj => obj == null ? string.Empty : string.Format("{0:n0}", obj));
                     });
                     column.CellsHorizontalAlignment(HorizontalAlignment.Center);
                     column.IsVisible(true);
                     column.Order(5);
                 });

                 columns.AddColumn(column =>
                 {
                     column.PropertyName("CF2");
                     column.HeaderCell("ف.م.");
                     column.Width(3);
                     column.AggregateFunction(aggregateFunction =>
                     {
                         aggregateFunction.NumericAggregateFunction(AggregateFunction.Sum);
                         aggregateFunction.DisplayFormatFormula(obj => obj == null ? string.Empty : string.Format("{0:n0}", obj));
                     });
                     column.CellsHorizontalAlignment(HorizontalAlignment.Center);
                     column.ColumnItemsTemplate(template =>
                     {
                         template.TextBlock();
                         template.DisplayFormatFormula(obj => obj == null ? string.Empty : string.Format("{0:n0}", obj));
                     });
                     column.CalculatedField(true,
                         list =>
                         {
                             if (list == null) return string.Empty;
                             var balance = list.GetValueOf<User>(x => x.Balance);
                             return (long)balance * 3;
                         });
                     column.IsVisible(true);
                     column.Order(6);
                 });
             })
             .Export(export =>
             {
                 export.ToExcel(footer: "Footer text", header: "&24&U&\"Arial,Regular Bold\" New rpt.", pageLayoutView: true);
                 export.ToXml();
             })
             .Generate(data => data.AsPdfFile(AppPath.ApplicationPath + "\\Pdf\\RptCalculatedFieldsSample.pdf"));
        }
    }
}

 column.IsRowNumber(true);

                 columns.AddColumn(column =>
                 {
                     column.PropertyName("CF1");
                     column.CalculatedField(true,
                         list =>
                         {
                             if (list == null) return string.Empty;
                             var name = list.GetSafeStringValueOf<User>(x => x.Name);
                             var lastName = list.GetSafeStringValueOf<User>(x => x.LastName);
                             return name + " - " + lastName;
                         });
                     column.HeaderCell("ف.م.");
                     column.Width(3);
                     column.CellsHorizontalAlignment(HorizontalAlignment.Center);
                     column.IsVisible(true);
                     column.Order(4);
                 });

 public void CalculatedField(bool isCalculatedField, Func<IList<CellData>, object> calculatedFieldFormula)

                 columns.AddColumn(column =>
                 {
                     column.PropertyName("CF2");
                     column.HeaderCell("ف.م.");
                     column.Width(3);
                     column.AggregateFunction(aggregateFunction =>
                     {
                         aggregateFunction.NumericAggregateFunction(AggregateFunction.Sum);
                         aggregateFunction.DisplayFormatFormula(obj => obj == null ? string.Empty : string.Format("{0:n0}", obj));
                     });
                     column.CellsHorizontalAlignment(HorizontalAlignment.Center);
                     column.ColumnItemsTemplate(template =>
                     {
                         template.TextBlock();
                         template.DisplayFormatFormula(obj => obj == null ? string.Empty : string.Format("{0:n0}", obj));
                     });
                     column.CalculatedField(true,
                         list =>
                         {
                             if (list == null) return string.Empty;
                             var balance = list.GetValueOf<User>(x => x.Balance);
                             return (long)balance * 3;
                         });
                     column.IsVisible(true);
                     column.Order(6);
                 });

 PM> Install-Package Rx-Main
PM> Install-Package Rx-WPF

        private static IEnumerable<string> readFile(string filename)
        {
            using (TextReader reader = File.OpenText(filename))
            {
                string line;
                while ((line = reader.ReadLine()) != null)
                {
                    Thread.Sleep(100);
                    yield return line;
                }
            }
        }

<Window x:Class="WpfApplicationRxTests.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="450" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition  Height="*" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <Button Grid.Row="0" Name="btnGenerateSequence" Click="btnGenerateSequence_Click">Generate sequence</Button>
        <ListBox Grid.Row="1" Name="lstNumbers"  />
        <Button Grid.Row="2" IsEnabled="False" Name="btnStop" Click="btnStop_Click">Stop</Button>
    </Grid>
</Window>

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Reactive.Concurrency;
using System.Reactive.Linq;
using System.Threading;
using System.Windows;

namespace WpfApplicationRxTests
{
    public partial class MainWindow
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private static IEnumerable<string> readFile(string filename)
        {
            using (TextReader reader = File.OpenText(filename))
            {
                string line;
                while ((line = reader.ReadLine()) != null)
                {
                    Thread.Sleep(100);
                    yield return line;
                }
            }
        }

        private IDisposable _subscribe;
        private void btnGenerateSequence_Click(object sender, RoutedEventArgs e)
        {
            btnGenerateSequence.IsEnabled = false;
            btnStop.IsEnabled = true;

            var items = new ObservableCollection<string>();
            lstNumbers.ItemsSource = items;
            _subscribe = readFile("test.txt").ToObservable()
                               .SubscribeOn(ThreadPoolScheduler.Instance)
                               .ObserveOn(DispatcherScheduler.Current)
                               .Finally(finallyAction: () =>
                               {
                                   btnGenerateSequence.IsEnabled = true;
                                   btnStop.IsEnabled = false;
                               })
                               .Subscribe(onNext: line =>
                               {
                                   items.Add(line);
                               },
                               onError: ex => { },
                               onCompleted: () =>
                               {
                                   //lstNumbers.ItemsSource = items;
                               });
        }

        private void btnStop_Click(object sender, RoutedEventArgs e)
        {
            _subscribe.Dispose();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Windows;
using System.Windows.Media;
using CrMap.Models;

namespace CrMap.ViewModels
{
    public class CrMapViewModel
    {
        public IList<Symbol> Symbols { set; get; }
        public int GridRows { set; get; }
        public int GridCols { set; get; }

        public CrMapViewModel()
        {
            fillDataSource();
        }

        private void fillDataSource()
        {
            Symbols = new List<Symbol>();
            GridCols = 15;

            var fontFamily = new FontFamily(new Uri("pack://application:,,,/"), "/Fonts/#whhglyphs");

            GlyphTypeface glyph = null;
            Typeface glyphTypeface = null;
            foreach (var typeface in fontFamily.GetTypefaces())
            {
                if (typeface.TryGetGlyphTypeface(out glyph) && (glyph != null))
                {
                    glyphTypeface = typeface;
                    break;
                }
            }

            if (glyph == null)
                throw new InvalidOperationException("Couldn't find a GlyphTypeface.");

            GridRows = (glyph.CharacterToGlyphMap.Count / GridCols) + 1;

            foreach (var item in glyph.CharacterToGlyphMap)
            {
                var index = item.Key;
                Symbols.Add(new Symbol
                {
                    Character = Convert.ToChar(index),
                    CharacterCode = string.Format("&#x{0:X}", index)
                });

                saveToFile(glyphTypeface, index);
            }
        }

        private static void saveToFile(Typeface glyphTypeface, int index)
        {
            var formattedText = new FormattedText(
                                        textToFormat: Convert.ToChar(index).ToString(),
                                        culture: new CultureInfo("en-us"),
                                        flowDirection: FlowDirection.LeftToRight,
                                        typeface: glyphTypeface,
                                        emSize: 20,
                                        foreground: Brushes.Black);
            var geometry = formattedText.BuildGeometry(new Point(0, 0));
            var path = geometry.GetFlattenedPathGeometry();
            File.WriteAllText(index + ".path", path.ToString());
        }
    }
}

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1.  Get/GetAsync(with data retriever)
2.  Get/GetAsync(without data retriever)
3.  Set/SetAsync
4.  Remove/RemoveAsync
5.  ~~Refresh/RefreshAsync (was removed)~~
6.  RemoveByPrefix/RemoveByPrefixAsync
7.  SetAll/SetAllAsync
8.  GetAll/GetAllAsync
9.  GetByPrefix/GetByPrefixAsync
10.  RemoveAll/RemoveAllAsync
11.  GetCount
12.  Flush/FlushAsync
13.  TrySet/TrySetAsync
14.  GetExpiration/GetExpirationAsync

1. In-Memory
2. Memcached
3. Redis(Based on StackExchange.Redis)
4. Redis(Based on csredis)
5. SQLite
6. Hybrid
7. Disk
8. LiteDb

1. BinaryFormatter
2. MessagePack
3. Newtonsoft.Json
4. Protobuf
5. System.Text.Json

• MessagePack
• Newtonsoft.Json
• Protobuf
• System.Text.Json

 PM> install-package OxyPlot.Wpf

<Window x:Class="OxyPlotWpfTests.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:oxy="http://oxyplot.org/wpf"
        xmlns:oxyPlotWpfTests="clr-namespace:OxyPlotWpfTests"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <oxyPlotWpfTests:MainWindowViewModel x:Key="MainWindowViewModel" />
    </Window.Resources>
    <Grid DataContext="{Binding Source={StaticResource MainWindowViewModel}}">
        <oxy:PlotView Model="{Binding PlotModel}"/>
    </Grid>
</Window>

public class MainWindowViewModel
{
   public PlotModel PlotModel { get; set; } 

        private void createPlotModel()
        {
            PlotModel = new PlotModel
            {
                Title = "سری خطوط",
                Subtitle = "Pan (right click and drag)/Zoom (Middle click and drag)/Reset (double-click)"
            };
            PlotModel.MouseDown += (sender, args) =>
            {
                if (args.ChangedButton == OxyMouseButton.Left && args.ClickCount == 2)
                {
                    foreach (var axis in PlotModel.Axes)
                        axis.Reset();

                    PlotModel.InvalidatePlot(false);
                }
            };
        }

       readonly LinearAxis _xAxis = new LinearAxis();
        private void addXAxis()
        {
            _xAxis.Minimum = 0;
            _xAxis.MaximumPadding = 1;
            _xAxis.MinimumPadding = 1;
            _xAxis.Position = AxisPosition.Bottom;
            _xAxis.Title = "X axis";
            _xAxis.MajorGridlineStyle = LineStyle.Solid;
            _xAxis.MinorGridlineStyle = LineStyle.Dot;
            PlotModel.Axes.Add(_xAxis);
        }

        readonly LinearAxis _yAxis = new LinearAxis();
        private void addYAxis()
        {
            _yAxis.Minimum = 0;
            _yAxis.Title = "Y axis";
            _yAxis.MaximumPadding = 1;
            _yAxis.MinimumPadding = 1;
            _yAxis.MajorGridlineStyle = LineStyle.Solid;
            _yAxis.MinorGridlineStyle = LineStyle.Dot;
            PlotModel.Axes.Add(_yAxis);
        }

        readonly LineSeries _lineSeries1 = new LineSeries();
        private void addLineSeries1()
        {
            _lineSeries1.MarkerType = MarkerType.Circle;
            _lineSeries1.StrokeThickness = 2;
            _lineSeries1.MarkerSize = 3;
            _lineSeries1.Title = "Start";
            _lineSeries1.MouseDown += (s, e) =>
            {
                if (e.ChangedButton == OxyMouseButton.Left)
                {
                    PlotModel.Subtitle = "Index of nearest point in LineSeries: " + Math.Round(e.HitTestResult.Index);
                    PlotModel.InvalidatePlot(false);
                }
            };
            PlotModel.Series.Add(_lineSeries1);
        }

        readonly LineSeries _lineSeries2 = new LineSeries();
        private void addLineSeries2()
        {
            _lineSeries2.MarkerType = MarkerType.Circle;
            _lineSeries2.Title = "End";
            _lineSeries2.StrokeThickness = 2;
            _lineSeries2.MarkerSize = 3;
            _lineSeries2.MouseDown += (s, e) =>
            {
                if (e.ChangedButton == OxyMouseButton.Left)
                {
                    PlotModel.Subtitle = "Index of nearest point in LineSeries: " + Math.Round(e.HitTestResult.Index);
                    PlotModel.InvalidatePlot(false);
                }
            };
            PlotModel.Series.Add(_lineSeries2);
        }

        private int _xMax;
        private int _yMax;
        private bool _haveNewPoints;
        private void addPoints()
        {
            var timer = new DispatcherTimer {Interval = TimeSpan.FromSeconds(1)};
            var rnd = new Random();
            var x = 1;
            updateXMax(x);
            timer.Tick += (sender, args) =>
            {
                var y1 = rnd.Next(100);
                updateYMax(y1);
                _lineSeries1.Points.Add(new DataPoint(x, y1));

                var y2 = rnd.Next(100);
                updateYMax(y2);
                _lineSeries2.Points.Add(new DataPoint(x, rnd.Next(y2)));

                x++;

                updateXMax(x);
                _haveNewPoints = true;
            };
            timer.Start();
        }

        private void updateXMax(int value)
        {
            if (value > _xMax)
            {
                _xMax = value;
            }
        }

        private void updateYMax(int value)
        {
            if (value > _yMax)
            {
                _yMax = value;
            }
        }

        private readonly Stopwatch _stopwatch = new Stopwatch();
        private void updatePlot()
        {
            CompositionTarget.Rendering += (sender, args) =>
            {
                if (_stopwatch.ElapsedMilliseconds > _lastUpdateMilliseconds + 2000 && _haveNewPoints)
                {
                    if (_yMax > 0 && _xMax > 0)
                    {
                        _yAxis.Maximum = _yMax + 3;
                        _xAxis.Maximum = _xMax + 1;
                    }

                    PlotModel.InvalidatePlot(false);

                    _haveNewPoints = false;
                    _lastUpdateMilliseconds = _stopwatch.ElapsedMilliseconds;
                }
            };
        }

public class DebuggerBrowsableTest
{
    [DebuggerBrowsable(DebuggerBrowsableState.Never)] // عدم نمایش در زمان دیباگ در پنجره متغیرها
    public string FirstName { get; set; }

    [DebuggerBrowsable(DebuggerBrowsableState.Collapsed)] // مقدار پیش فرض
    public string LastName { get; set; }

    [DebuggerBrowsable( DebuggerBrowsableState.RootHidden )] // عدم نمایش در زمان دیباگ در پنجره متغیرها
    public string FullName => FirstName + " " + LastName;

    [DebuggerBrowsable( DebuggerBrowsableState.RootHidden )] // تنها در زمانی که یک آرایه یا لیست باشد نمایش داده می‌شود
    public string[] FullNameArray => new string[] { FirstName + " " + LastName };
}

Operator ??

عملگر ??  در صورتی که عملوند سمت چپ آن تهی (null) نباشد، مقدار آن را باز می‌گرداند و در غیر اینصورت مقدار عملوند سمت راست خود را باز می‌گرداند. نوع‌های تهی پذیر (nullable) می‌توانند دارای مقدار و یا به صورت تعریف نشده باشند. عملگر ?? وقتی که یک نوع تهی پذیر به یک نوع غیرتهی پذیر انتساب داده می‌شود، مقدار پیش فرض آن را باز می‌گرداند.

int? x = null;
int y = x ?? -1;
Console.WriteLine("y now equals -1 because x was null => {0}", y);
int i = DefaultValueOperatorTest.GetNullableInt() ?? default(int);
Console.WriteLine("i equals now 0 because GetNullableInt() returned null => {0}", i);
string s = DefaultValueOperatorTest.GetStringValue();
Console.WriteLine("Returns 'Unspecified' because s is null => {0}", s ?? "Unspecified");

// RandomGenerator.cs
using System;
using System.Security.Cryptography;

namespace PersianCaptchaHandler
{
    public class RandomGenerator
    {
        private static readonly byte[] Randb = new byte[4];
        private static readonly RNGCryptoServiceProvider Rand = new RNGCryptoServiceProvider();

        public static int Next()
        {
            Rand.GetBytes(Randb);
            var value = BitConverter.ToInt32(Randb, 0);
            if (value < 0) value = -value;
            return value;
        }
        public static int Next(int max)
        {
            Rand.GetBytes(Randb);
            var value = BitConverter.ToInt32(Randb, 0);
            value = value%(max + 1);
            if (value < 0) value = -value;
            return value;
        }
        public static int Next(int min, int max)
        {
            var value = Next(max - min) + min;
            return value;
        }
    }
}

// NumberToString.cs
namespace PersianCaptchaHandler
{
    public class NumberToString
    {

        #region Fields
        private static readonly string[] Yakan = new[] { "صفر", "یک", "دو", "سه", "چهار", "پنج", "شش", "هفت", "هشت", "نه" };
        private static readonly string[] Dahgan = new[] { "", "", "بیست", "سی", "چهل", "پنجاه", "شصت", "هفتاد", "هشتاد", "نود" };
        private static readonly string[] Dahyek = new [] { "ده", "یازده", "دوازده", "سیزده", "چهارده", "پانزده", "شانزده", "هفده", "هجده", "نوزده" };
        private static readonly string[] Sadgan = new [] { "", "یکصد", "دوصد", "سیصد", "چهارصد", "پانصد", "ششصد", "هفتصد", "هشتصد", "نهصد" };
        private static readonly string[] Basex = new [] { "", "هزار", "میلیون", "میلیارد", "تریلیون" };
        #endregion

        private static string Getnum3(int num3)
        {
            var s = "";
            var d12 = num3 % 100;
            var d3 = num3 / 100;
            if (d3 != 0)
                s = Sadgan[d3] + " و ";
            if ((d12 >= 10) && (d12 <= 19))
            {
                s = s + Dahyek[d12 - 10];
            }
            else
            {
                var d2 = d12 / 10;
                if (d2 != 0)
                    s = s + Dahgan[d2] + " و ";
                var d1 = d12 % 10;
                if (d1 != 0)
                    s = s + Yakan[d1] + " و ";
                s = s.Substring(0, s.Length - 3);
            }
            return s;
        }

        public static string ConvertIntNumberToFarsiAlphabatic(string snum)
        {
            var stotal = "";
            if (snum == "0") return Yakan[0];

            snum = snum.PadLeft(((snum.Length - 1) / 3 + 1) * 3, '0');
            var l = snum.Length / 3 - 1;
            for (var i = 0; i <= l; i++)
            {
                var b = int.Parse(snum.Substring(i * 3, 3));
                if (b != 0)
                    stotal = stotal + Getnum3(b) + " " + Basex[l - i] + " و ";
            }
            stotal = stotal.Substring(0, stotal.Length - 3);
            return stotal;
        }
    }
}

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;

namespace PersianCaptchaHandler
{
    public class Encryptor
    {
        #region constraints
        private static string Password { get { return "Mehdi"; } }
        private static string Salt { get { return "Payervand"; } }
        #endregion

        public static string Encrypt(string clearText)
        {
            // Turn text to bytes
            var clearBytes = Encoding.Unicode.GetBytes(clearText);

            var pdb = new PasswordDeriveBytes(Password, Encoding.Unicode.GetBytes(Salt));

            var ms = new MemoryStream();
            var alg = Rijndael.Create();

            alg.Key = pdb.GetBytes(32);
            alg.IV = pdb.GetBytes(16);

            var cs = new CryptoStream(ms, alg.CreateEncryptor(), CryptoStreamMode.Write);

            cs.Write(clearBytes, 0, clearBytes.Length);
            cs.Close();

            var encryptedData = ms.ToArray();

            return Convert.ToBase64String(encryptedData);
        }
        public static string Decrypt(string cipherText)
        {
            // Convert text to byte
            var cipherBytes = Convert.FromBase64String(cipherText);

            var pdb = new PasswordDeriveBytes(Password, Encoding.Unicode.GetBytes(Salt));

            var ms = new MemoryStream();
            var alg = Rijndael.Create();

            alg.Key = pdb.GetBytes(32);
            alg.IV = pdb.GetBytes(16);

            var cs = new CryptoStream(ms, alg.CreateDecryptor(), CryptoStreamMode.Write);

            cs.Write(cipherBytes, 0, cipherBytes.Length);
            cs.Close();

            var decryptedData = ms.ToArray();

            return Encoding.Unicode.GetString(decryptedData);
        }
    }
}

// Utils.cs
using System.Text.RegularExpressions;

namespace PersianCaptchaHandler
{
    public class Utils
    {
        private static readonly Regex NumberMatch = new Regex(@"^([0-9]*|\d*\.\d{1}?\d*)$", RegexOptions.Compiled);
        public static bool IsNumber(string number2Match)
        {
            return NumberMatch.IsMatch(number2Match);
        }
    }
}

<add verb="GET" path="/captcha/" type="PersianCaptchaHandler.CaptchaHandler, PersianCaptchaHandler, Version=1.0.0.0, Culture=neutral"  />

<!-- ASPX -->
<dl>
    <dt>تصویر امنیتی</dt>
    <dd>
        <asp:Image ID="imgCaptchaText" runat="server" AlternateText="CaptchaImage" />
        <asp:HiddenField ID="hfCaptchaText" runat="server" />
        <asp:ImageButton ID="btnRefreshCaptcha" runat="server" ImageUrl="/img/refresh.png"
            OnClick="btnRefreshCaptcha_Click" />
        <br />
        <asp:TextBox ID="txtCaptcha" runat="server" AutoCompleteType="Disabled"></asp:TextBox>
    </dd>
    <dd>
        <asp:Button ID="btnSubmit" runat="server" Text="ثبت" OnClick="btnSubmit_Click" />
    </dd>
</dl>
<asp:Label ID="lblMessage" runat="server"></asp:Label>

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
                SetCaptcha();
        }

        private void SetCaptcha()
        {
            lblMessage.Text =
            txtCaptcha.Text = string.Empty;

            var newNumber =
                RandomGenerator.Next(100, 999)
                ;

            var farsiAlphabatic = NumberToString.ConvertIntNumberToFarsiAlphabatic(newNumber.ToString());

            hfCaptchaText.Value =
                HttpUtility
                .UrlEncode(
                    Encryptor.Encrypt(
                        farsiAlphabatic
                    )
                );

            txtCaptcha.Text = string.Empty;
            imgCaptchaText.ImageUrl =
                "/captcha/?text=" + hfCaptchaText.Value;
        }

        private string GetCaptcha()
        {
            var farsiAlphabatic = NumberToString.ConvertIntNumberToFarsiAlphabatic(txtCaptcha.Text);

            var encryptedString =
                HttpUtility
                .UrlEncode(
                    Encryptor.Encrypt(
                        farsiAlphabatic
                    )
                );

            return encryptedString;
        }

        private bool ValidateUserInputForLogin()
        {
            if (!Utils.IsNumber(txtCaptcha.Text))
            {
                lblMessage.Text = "تصویر امنیتی را بطور صحیح وارد نکرده اید";
                return false;
            }

            var strGetCaptcha =
                GetCaptcha();

            var strDecodedVAlue =
                hfCaptchaText.Value;

            if (strDecodedVAlue != strGetCaptcha)
            {
                lblMessage.Text = "کلمه امنیتی اشتباه است";
                SetCaptcha();
                return false;
            }
            return true;
        }

        protected void btnSubmit_Click(object sender, EventArgs e)
        {
            if (!ValidateUserInputForLogin()) return;
            lblMessage.Text = "کلمه امنیتی درست است";
        }

        protected void btnRefreshCaptcha_Click(object sender, ImageClickEventArgs e)
        {
            SetCaptcha();
        }