using System.AddIn.Pipeline;
using System.AddIn.Contract;

namespace CalculatorConract
{
  [AddInContract]
  public interface ICalculatorContract : IContract
  {
      double Operate(string operation, double a, double b);
  }
}

using System;
using CalculatorConract.AddInViews;
using System.AddIn;

namespace CalculatorAddIn
{
   [AddIn]
  public class MyCalculatorAddIn : ICalculator
  {
      public double Operate(string operation, double a, double b)
      {
          throw new NotImplementedException();
      }
  }
}

using System;
using CalculatorConract.AddInViews;
using System.AddIn;

namespace CalculatorAddIn
{
  [AddIn("افزونه یک", Description = "توضیحات", Publisher = "نویسنده", Version = "نگارش یک")]
  public class MyCalculatorAddIn : ICalculator
  {
      public double Operate(string operation, double a, double b)
      {
          switch (operation)
          {
              case "+":
                  return a + b;
              case "-":
                  return a - b;
              case "*":
                  return a * b;
              default:
                  throw new NotSupportedException("عملیات مورد نظر توسط این افزونه پشتیبانی نمی‌شود");
          }
      }
  }
}

using System;
using System.AddIn.Hosting;
using CalculatorConract.HostViews;

namespace Calculator
{
  class Program
  {
      private static ICalculator _calculator;

      static void doOperation()
      {
          Console.WriteLine("1+2: {0}", _calculator.Operate("+", 1, 2));
      }

      static void Main(string[] args)
      {
          //مسیر پوشه ریشه مربوطه به خط لوله افزونه‌ها
          string path = Environment.CurrentDirectory;

          //مشخص سازی مسیر خواندن و کش کردن افزونه‌ها
          AddInStore.Update(path);

          //یافتن افزونه‌هایی سازگار با شرایط قرارداد پروژه
          //در اینجا هیچ افزونه‌ای بارگذاری نمی‌شود
          var addIns = AddInStore.FindAddIns(typeof(ICalculator), path);

          //اگر افزونه‌ای یافت شد
          if (addIns.Count > 0)
          {
              var addIn = addIns[0]; //استفاده از اولین افزونه
              Console.WriteLine("1st addIn: {0}", addIn.Name);

              //فعال سازی افزونه و همچنین مشخص سازی سطح دسترسی آن
              _calculator = addIn.Activate<ICalculator>(AddInSecurityLevel.Intranet);

              //یک نمونه از استفاده آن
              doOperation();
          }

          Console.WriteLine("Press a key...");
          Console.ReadKey();
      }
  }
}

//فعال سازی افزونه و همچنین مشخص سازی سطح دسترسی آن
//همچنین جدا سازی پروسه اجرایی افزونه از هاست
   _calculator = addIn.Activate<ICalculator>(
                  new AddInProcess(),
                  AddInSecurityLevel.Intranet);

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<?xml version="1.0"?>

<configuration>
<configSections>
  <sectionGroup name="elmah">
    <section name="security" requirePermission="false" type="Elmah.SecuritySectionHandler, Elmah"/>
    <section name="errorLog" requirePermission="false" type="Elmah.ErrorLogSectionHandler, Elmah" />
    <section name="errorMail" requirePermission="false" type="Elmah.ErrorMailSectionHandler, Elmah" />
    <section name="errorFilter" requirePermission="false" type="Elmah.ErrorFilterSectionHandler, Elmah"/>
    <section name="errorTweet" requirePermission="false" type="Elmah.ErrorTweetSectionHandler, Elmah"/>
  </sectionGroup>
</configSections>

<elmah>
  <security allowRemoteAccess="1" />
  <errorLog type="Elmah.SQLiteErrorLog, Elmah" connectionStringName="cn1" />
</elmah>


<appSettings/>

<connectionStrings>
  <add name="cn1" connectionString="data source=~/ErrorsLog/Errors.db" />
</connectionStrings>

<system.web>
  <httpModules>
    <add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah"/>
  </httpModules>

  <httpHandlers>
    <add verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" />
  </httpHandlers>

  <compilation debug="true"/>

  <authentication mode="Windows" />
</system.web>

</configuration>

private static readonly Regex _valueFormatMatch = new Regex(@"[0-9]", RegexOptions.Compiled);