U+202A:   LEFT-TO-RIGHT EMBEDDING (LRE) 
U+202B:   RIGHT-TO-LEFT EMBEDDING (RLE) 
U+202D:   LEFT-TO-RIGHT OVERRIDE (LRO) 
U+202E:   RIGHT-TO-LEFT OVERRIDE (RLO) 
U+202C:   POP DIRECTIONAL FORMATTING (PDF) 

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

namespace RleTests
{
    class Program
    {
        const char RightToLeftEmbedding = (char)0x202B;
        const char PopDirectionalFormatting = (char)0x202C;

        static string FixWeakCharacters(string data)
        {
            if (string.IsNullOrWhiteSpace(data)) return string.Empty;
            var weakCharacters = new[] { @"\", "/", "+", "-", "=", ";", "$" };
            foreach (var weakCharacter in weakCharacters)
            {
                data = data.Replace(weakCharacter, RightToLeftEmbedding + weakCharacter + PopDirectionalFormatting);
            }
            return data;
        }

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

                FontFactory.Register("c:\\windows\\fonts\\Arial.ttf");
                Font tahoma = FontFactory.GetFont("Arial", BaseFont.IDENTITY_H);

                var table1 = new PdfPTable(1);
                table1.WidthPercentage = 100;

                var pdfCell = new PdfPCell
                {
                    RunDirection = PdfWriter.RUN_DIRECTION_RTL,
                    Border = 0,
                    Phrase = new Phrase(FixWeakCharacters(
                        "تاریخ: " + "1390/11/18" + Environment.NewLine +
                        "شماره پروژه: " + "1/2/3/4/56" + Environment.NewLine +
                        "اسلش: " + " 12/A/13 " + Environment.NewLine +
                        "بک اسلش: " + "  12\\13\\14 " + Environment.NewLine +
                        "مساوی و جمع: " + " 2+3=5 " + Environment.NewLine +
                        "سمی کولون: " + " 2=1+1; " + Environment.NewLine +
                        "دلار: " + "12$" + Environment.NewLine +
                        "کاما: " + "12,34,67" + Environment.NewLine +
                        "نقطه: " + "12.34" + Environment.NewLine +
                        "پرانتز: " + "متن (ساده)"
                        ),
                        tahoma)
                };

                table1.AddCell(pdfCell);
                pdfDoc.Add(table1);

            }

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

<span dir="ltr" style="display:inline">1390/11/19</span>

U+202A:   LEFT-TO-RIGHT EMBEDDING (LRE) 
U+202B:   RIGHT-TO-LEFT EMBEDDING (RLE) 
U+202D:   LEFT-TO-RIGHT OVERRIDE (LRO) 
U+202E:   RIGHT-TO-LEFT OVERRIDE (RLO) 
U+202C:   POP DIRECTIONAL FORMATTING (PDF) 

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

namespace RleTests
{
    class Program
    {
        const char RightToLeftEmbedding = (char)0x202B;
        const char PopDirectionalFormatting = (char)0x202C;

        static string FixWeakCharacters(string data)
        {
            if (string.IsNullOrWhiteSpace(data)) return string.Empty;
            var weakCharacters = new[] { @"\", "/", "+", "-", "=", ";", "$" };
            foreach (var weakCharacter in weakCharacters)
            {
                data = data.Replace(weakCharacter, RightToLeftEmbedding + weakCharacter + PopDirectionalFormatting);
            }
            return data;
        }

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

                FontFactory.Register("c:\\windows\\fonts\\Arial.ttf");
                Font tahoma = FontFactory.GetFont("Arial", BaseFont.IDENTITY_H);

                var table1 = new PdfPTable(1);
                table1.WidthPercentage = 100;

                var pdfCell = new PdfPCell
                {
                    RunDirection = PdfWriter.RUN_DIRECTION_RTL,
                    Border = 0,
                    Phrase = new Phrase(FixWeakCharacters(
                        "تاریخ: " + "1390/11/18" + Environment.NewLine +
                        "شماره پروژه: " + "1/2/3/4/56" + Environment.NewLine +
                        "اسلش: " + " 12/A/13 " + Environment.NewLine +
                        "بک اسلش: " + "  12\\13\\14 " + Environment.NewLine +
                        "مساوی و جمع: " + " 2+3=5 " + Environment.NewLine +
                        "سمی کولون: " + " 2=1+1; " + Environment.NewLine +
                        "دلار: " + "12$" + Environment.NewLine +
                        "کاما: " + "12,34,67" + Environment.NewLine +
                        "نقطه: " + "12.34" + Environment.NewLine +
                        "پرانتز: " + "متن (ساده)"
                        ),
                        tahoma)
                };

                table1.AddCell(pdfCell);
                pdfDoc.Add(table1);

            }

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

<span dir="ltr" style="display:inline">1390/11/19</span>

namespace WpfRptTests.Model
{
  public class Product
  {
      public string Name { set; get; }
      public int Price { set; get; }
  }
}

<FlowDocument xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            FlowDirection="RightToLeft" FontFamily="Tahoma"
            xmlns:xrd="clr-namespace:CodeReason.Reports.Document;assembly=CodeReason.Reports"
            PageHeight="29.7cm" PageWidth="21cm" ColumnWidth="21cm">  

</FlowDocument>

  <xrd:ReportProperties>
      <xrd:ReportProperties.ReportName>SimpleReport</xrd:ReportProperties.ReportName>
      <xrd:ReportProperties.ReportTitle>گزارش از محصولات</xrd:ReportProperties.ReportTitle>
  </xrd:ReportProperties>

    <xrd:SectionReportHeader PageHeaderHeight="2" Padding="10,10,10,0" FontSize="12">
      <Table CellSpacing="0">
          <Table.Columns>
              <TableColumn Width="*" />
              <TableColumn Width="*" />
          </Table.Columns>
          <TableRowGroup>
              <TableRow>
                  <TableCell>
                      <Paragraph>
                          <xrd:InlineContextValue PropertyName="ReportTitle" />
                      </Paragraph>
                  </TableCell>
                  <TableCell>
                      <Paragraph TextAlignment="Right">
                          <xrd:InlineDocumentValue PropertyName="PrintDate" Format="dd.MM.yyyy HH:mm:ss" />
                      </Paragraph>
                  </TableCell>
              </TableRow>
          </TableRowGroup>
      </Table>
  </xrd:SectionReportHeader>

  <xrd:SectionReportFooter PageFooterHeight="2" Padding="10,0,10,10" FontSize="12">
      <Table CellSpacing="0">
          <Table.Columns>
              <TableColumn Width="*" />
              <TableColumn Width="*" />
          </Table.Columns>
          <TableRowGroup>
              <TableRow>
                  <TableCell>
                      <Paragraph>
                          نام کاربر:
                          <xrd:InlineDocumentValue PropertyName="RptBy" Format="dd.MM.yyyy HH:mm:ss" />
                      </Paragraph>
                  </TableCell>
                  <TableCell>
                      <Paragraph TextAlignment="Right">
                          صفحه
                          <xrd:InlineContextValue PropertyName="PageNumber" FontWeight="Bold" /> از
                          <xrd:InlineContextValue PropertyName="PageCount" FontWeight="Bold" />
                      </Paragraph>
                  </TableCell>
              </TableRow>
          </TableRowGroup>
      </Table>
  </xrd:SectionReportFooter>

data.ReportDocumentValues.Add("PrintDate", DateTime.Now);
data.ReportDocumentValues.Add("RptBy", "وحید");

  <Section Padding="80,10,40,10" FontSize="12">
      <Paragraph FontSize="24" TextAlignment="Center" FontWeight="Bold">
          <xrd:InlineContextValue PropertyName="ReportTitle" />
      </Paragraph>
      <Paragraph  TextAlignment="Center">
          گزارش از لیست محصولات در تاریخ:
          <xrd:InlineDocumentValue PropertyName="PrintDate" Format="dd.MM.yyyy HH:mm:ss" />
          توسط:
          <xrd:InlineDocumentValue PropertyName="RptBy" Format="dd.MM.yyyy HH:mm:ss" />
      </Paragraph>
      <xrd:SectionDataGroup DataGroupName="ItemList">
          <Table CellSpacing="0" BorderBrush="Black" BorderThickness="0.02cm">
              <Table.Resources>
                  <!-- Style for header/footer rows. -->
                  <Style x:Key="headerFooterRowStyle" TargetType="{x:Type TableRowGroup}">
                      <Setter Property="FontWeight" Value="DemiBold"/>
                      <Setter Property="FontSize" Value="16"/>
                      <Setter Property="Background" Value="LightGray"/>
                  </Style>

                  <!-- Style for data rows. -->
                  <Style x:Key="dataRowStyle" TargetType="{x:Type TableRowGroup}">
                      <Setter Property="FontSize" Value="12"/>
                  </Style>

                  <!-- Style for data cells. -->
                  <Style TargetType="{x:Type TableCell}">
                      <Setter Property="Padding" Value="0.1cm"/>
                      <Setter Property="BorderBrush" Value="Black"/>
                      <Setter Property="BorderThickness" Value="0.01cm"/>
                  </Style>
              </Table.Resources>

              <Table.Columns>
                  <TableColumn Width="0.8*" />
                  <TableColumn Width="0.2*" />
              </Table.Columns>
              <TableRowGroup Style="{StaticResource headerFooterRowStyle}">
                  <TableRow>
                      <TableCell>
                          <Paragraph TextAlignment="Center">
                              <Bold>نام محصول</Bold>
                          </Paragraph>
                      </TableCell>
                      <TableCell>
                          <Paragraph TextAlignment="Center">
                              <Bold>قیمت</Bold>
                          </Paragraph>
                      </TableCell>
                  </TableRow>
              </TableRowGroup>

              <TableRowGroup Style="{StaticResource dataRowStyle}">
                  <xrd:TableRowForDataTable TableName="Product">
                      <TableCell>
                          <Paragraph>
                              <xrd:InlineTableCellValue PropertyName="Name" />
                          </Paragraph>
                      </TableCell>
                      <TableCell>
                          <Paragraph TextAlignment="Center">
                              <xrd:InlineTableCellValue PropertyName="Price" AggregateGroup="Group1" />
                          </Paragraph>
                      </TableCell>
                  </xrd:TableRowForDataTable>
              </TableRowGroup>

              <TableRowGroup Style="{StaticResource headerFooterRowStyle}">
                  <TableRow>
                      <TableCell>
                          <Paragraph TextAlignment="Right">
                              <Bold>جمع کل</Bold>
                          </Paragraph>
                      </TableCell>
                      <TableCell>
                          <Paragraph TextAlignment="Center">
                              <Bold>
                                  <xrd:InlineAggregateValue AggregateGroup="Group1"
                                                            AggregateValueType="Sum"
                                                            EmptyValue="0"
                                                            FontWeight="Bold" />
                              </Bold>
                          </Paragraph>
                      </TableCell>
                  </TableRow>
              </TableRowGroup>

          </Table>

          <Paragraph TextAlignment="Center" Margin="5">
              در این گزارش
              <xrd:InlineAggregateValue AggregateGroup="Group1"
                                        AggregateValueType="Count"
                                        EmptyValue="هیچ"
                                        FontWeight="Bold" /> محصول با جمع کل قیمت
              <xrd:InlineAggregateValue AggregateGroup="Group1"
                                        AggregateValueType="Sum"
                                        EmptyValue="0"
                                        FontWeight="Bold" /> وجود دارند.
          </Paragraph>
      </xrd:SectionDataGroup>
  </Section>

<Window x:Class="WpfRptTests.MainWindow"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:c="clr-namespace:CodeReason.Reports.Controls;assembly=CodeReason.Reports"
      xmlns:vm="clr-namespace:WpfRptTests.ViewModel"
      Title="MainWindow" WindowState="Maximized" Height="350" Width="525">
  <Window.Resources>
      <vm:ProductViewModel x:Key="vmProductViewModel" />
  </Window.Resources>
  <Grid DataContext="{Binding Source={StaticResource vmProductViewModel}}">
      <c:BusyDecorator IsBusyIndicatorHidden="{Binding RptGuiModel.IsBusyIndicatorHidden}">
          <DocumentViewer Document="{Binding RptGuiModel.Document}"  />
      </c:BusyDecorator>
  </Grid>
</Window>

using System.ComponentModel;
using System.Windows.Documents;

namespace WpfRptTests.Model
{
  public class RptGuiModel
  {
      public IDocumentPaginatorSource Document { get; set; }
      public bool IsBusyIndicatorHidden { get; set; }
  }
}

using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using CodeReason.Reports;
using WpfRptTests.Helper;
using WpfRptTests.Model;

namespace WpfRptTests.ViewModel
{
  public class ProductViewModel
  {
      #region Constructors (1)

      public ProductViewModel()
      {
          RptGuiModel = new RptGuiModel();
          if (Stat.IsInDesignMode) return;
          //انجام عملیات نمایش گزارش در یک ترد دیگر جهت قفل نشدن ترد اصلی برنامه
          showReportAsync();
      }

      #endregion Constructors

      #region Properties (1)

      public RptGuiModel RptGuiModel { set; get; }

      #endregion Properties

      #region Methods (3)

      // Private Methods (3)

      private static List<Product> getProducts()
      {
          var products = new List<Product>();
          for (var i = 0; i < 100; i++)
              products.Add(new Product { Name = string.Format("Product{0}", i), Price = i });

          return products;
      }

      private void showReport()
      {
          try
          {
              //Show BusyIndicator
              RptGuiModel.IsBusyIndicatorHidden = false;

              var reportDocument =
                  new ReportDocument
                  {
                      XamlData = File.ReadAllText(@"Report\SimpleReport.xaml"),
                      XamlImagePath = Path.Combine(Environment.CurrentDirectory, @"Report\")
                  };

              var data = new ReportData();

              // تعریف متغیرهای دلخواه و مقدار دهی آن‌ها
              data.ReportDocumentValues.Add("PrintDate", DateTime.Now);
              data.ReportDocumentValues.Add("RptBy", "وحید");

              // استفاده از یک سری اطلاعات آزمایشی به عنوان منبع داده
              data.DataTables.Add(getProducts().ToDataTable());

              var xps = reportDocument.CreateXpsDocument(data);
              //انقیاد آن به صورت غیر همزمان در ترد اصلی برنامه
              DispatcherHelper.DispatchAction(
                  () => RptGuiModel.Document = xps.GetFixedDocumentSequence()
                  );
          }
          catch (Exception ex)
          {
              //وجود این مورد ضروری است زیرا بروز استثناء در یک ترد به معنای خاتمه آنی برنامه است
              //todo: log errors
          }
          finally
          {
              //Hide BusyIndicator
              RptGuiModel.IsBusyIndicatorHidden = true;
          }
      }

      private void showReportAsync()
      {
          var thread = new Thread(showReport);
          thread.SetApartmentState(ApartmentState.STA); //for DocumentViewer
          thread.Start();
      }

      #endregion Methods
  }
}