private int n1, n2;

private void FirstCall()
{
  Service.GetRandomNumber(10, SecondCall);
}

private void SecondCall(int number)
{
  n1 = number;
  Service.GetRandomNumber(n1, ThirdCall);
}

private void ThirdCall(int number)
{
  n2 = number;
  // etc
}

private void FetchNumbers()
{
 int n1 = Service.GetRandomNumber(10);
 int n2 = Service.GetRandomNumber(n1);
}

private void FetchNumbers()
{
  int n1, n2;

  Service.GetRandomNumber(10, result =>
                                  {
                                      n1 = result;
                                      Service.GetRandomNumber(n1, secondResult =>
                                                                      {
                                                                          n2 = secondResult;
                                                                      });
                                  });
}

using System;
using System.Collections.Generic;
using System.Threading;

namespace CoroutinesSample
{
  class Program
  {
      static void printAll()
      {
          foreach (int x in integerList())
          {
              Console.WriteLine(x);
          }
      }

      static IEnumerable<int> integerList()
      {
          yield return 1;
          Thread.Sleep(1000);
          yield return 2;
          yield return 3;
      }

      static void Main()
      {
          printAll();
      }
  }
}

private bool MoveNext()
{
  switch (this.<>1__state)
  {
      case 0:
          this.<>1__state = -1;
          this.<>2__current = 1;
          this.<>1__state = 1;
          return true;

      case 1:
          this.<>1__state = -1;
          Thread.Sleep(0x3e8);
          this.<>2__current = 2;
          this.<>1__state = 2;
          return true;

      case 2:
          this.<>1__state = -1;
          this.<>2__current = 3;
          this.<>1__state = 3;
          return true;

      case 3:
          this.<>1__state = -1;
          break;
  }
  return false;
}

let data = (“John Doe”, 42)

printf “%A” data
// Output: (“John Doe”,42)

public class Tuple<T1>
up to:
public class Tuple<T1, T2, T3, T4, T5, T6, T7, TRest>

using System;
using System.Linq;
using System.Collections.Generic;

namespace TupleTest
{
   class TupleCS4
   {
  #region Methods (4)

  // Public Methods (4)

       public static Tuple<string, string> GetFNameLName(string name)
       {
           if (string.IsNullOrWhiteSpace(name))
               throw new NullReferenceException("name is empty.");

           var nameParts = name.Split(',');

           if (nameParts.Length != 2)
               throw new FormatException("name must contain ','");

           return Tuple.Create(nameParts[0], nameParts[1]);
       }

       public static void PrintSelectedTuple()
       {
           var list = new List<Tuple<string, int>>
                          {
                              new Tuple<string, int>("A", 1),
                              new Tuple<string, int>("B", 2),
                              new Tuple<string, int>("C", 3)
                          };

           var item = list.Where(x => x.Item2 == 2).SingleOrDefault();
           if (item != null)
               Console.WriteLine("Selected Item1: {0}, Item2: {1}",
                   item.Item1, item.Item2);
       }

       public static void PrintTuples()
       {
           var tuple1 = new Tuple<int>(12);
           Console.WriteLine("tuple1 contains: item1:{0}", tuple1.Item1);

           var tuple2 = Tuple.Create("Item1", 12);
           Console.WriteLine("tuple2 contains: item1:{0}, item2:{1}",
               tuple2.Item1, tuple2.Item2);

           var tuple3 = Tuple.Create(new DateTime(2010, 5, 6), "Item2", 20);
           Console.WriteLine("tuple3 contains: item1:{0}, item2:{1}, item3:{2}",
               tuple3.Item1, tuple3.Item2, tuple3.Item3);
       }

       public static void Tuple8()
       {
           var tup =
               new Tuple<int, int, int, int, int, int, int, Tuple<int, int>>
                   (1, 2, 3, 4, 5, 6, 7, new Tuple<int, int>(8, 9));

           Console.WriteLine("tup.Rest Item1: {0}, Item2: {1}",
                   tup.Rest.Item1,tup.Rest.Item2);
       }

  #endregion Methods
   }
}

using System;

namespace TupleTest
{
   class Program
   {
       static void Main()
       {
           var data = TupleCS4.GetFNameLName("Vahid, Nasiri");
           Console.WriteLine("Data Item1:{0} & Item2:{1}",
                   data.Item1, data.Item2);

           TupleCS4.PrintTuples();

           TupleCS4.PrintSelectedTuple();

           TupleCS4.Tuple8();

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

           string source =
           @"
               namespace Foo
               {
                    public class Bar
                    {
                        static void Main(string[] args)
                        {
                            Bar.SayHello();
                        }

                        public static void SayHello()
                        {
                            System.Console.WriteLine(""Hello World"");
                        }
                    }
               }
            ";

using System;
using System.Collections.Generic;
//دو فضای نامی که برای این منظور اضافه شده‌اند
using Microsoft.CSharp;
using System.CodeDom.Compiler;

namespace compilerTest
{
   class Program
   {
       static void compileIt1()
       {
           //سورس کد ما جهت کامپایل
           string source =
           @"
               namespace Foo
               {
                    public class Bar
                    {
                        static void Main(string[] args)
                        {
                            Bar.SayHello();
                        }

                        public static void SayHello()
                        {
                            System.Console.WriteLine(""Hello World"");
                        }
                    }
               }
            ";

           //تعیین نگارش کامپایلر مورد استفاده
           Dictionary<string, string> providerOptions = new Dictionary<string, string>
                {
                    {"CompilerVersion", "v3.5"}
                };
           //تعیین اینکه کد ما سی شارپ است
           CSharpCodeProvider provider = new CSharpCodeProvider(providerOptions);

           //تعیین اینکه خروجی یک فایل اجرایی است بعلاوه مشخص سازی محل ذخیره سازی فایل نهایی
           CompilerParameters compilerParams = new CompilerParameters
           {
               OutputAssembly = "D:\\Foo.EXE",
               GenerateExecutable = true
           };

           //عملیات کامپایل در اینجا صورت می‌گیرد
           CompilerResults results = provider.CompileAssemblyFromSource(compilerParams, source);

           //اگر خطایی وجود داشته باشد نمایش داده خواهد شد
           Console.WriteLine("Number of Errors: {0}", results.Errors.Count);
           foreach (CompilerError err in results.Errors)
           {
               Console.WriteLine("ERROR {0}", err.ErrorText);
           }
       }

       static void Main(string[] args)
       {
           compileIt1();

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

using System;
using System.Collections.Generic;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
using System.Reflection;

namespace compilerTest
{
   class Program
   {
       static void compileIt2()
       {
           //سورس کد ما جهت کامپایل
           string source =
           @"
               namespace Foo
               {
                    public class Bar
                    {
                        static void Main(string[] args)
                        {
                            Bar.SayHello();
                        }

                        public static void SayHello()
                        {
                            System.Console.WriteLine(""Hello World"");
                        }
                    }
               }
            ";

           //تعیین نگارش کامپایلر مورد استفاده
           Dictionary<string, string> providerOptions = new Dictionary<string, string>
                {
                    {"CompilerVersion", "v3.5"}
                };
           //تعیین اینکه کد ما سی شارپ است
           CSharpCodeProvider provider = new CSharpCodeProvider(providerOptions);

           //نحوه تعیین مشخص سازی کامپایل در حافظه
           CompilerParameters compilerParams = new CompilerParameters
           {
               GenerateInMemory = true,
               GenerateExecutable = false
           };

           //عملیات کامپایل در اینجا صورت می‌گیرد
           CompilerResults results = provider.CompileAssemblyFromSource(compilerParams, source);

           // اگر خطایی در کامپایل وجود نداشت متد دلخواه را فراخوانی می‌کنیم
           if (results.Errors.Count == 0)
           {
               //استفاده از ریفلکشن برای دسترسی به متد و فراخوانی آن
               Type type = results.CompiledAssembly.GetType("Foo.Bar");
               MethodInfo method = type.GetMethod("SayHello");
               method.Invoke(null, null);
           }
       }


       static void Main(string[] args)
       {
           compileIt2();

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

           string source =
           @"
             namespace Foo
             {
            
                 public class Bar
                 {
                     static void Main(string[] args)
                     {
                         Bar.SayHello();
                     }
            
                     public static void SayHello()
                     {
                         System.Console.WriteLine(""Hello World"");
                         var r = new System.Drawing.Rectangle(0,0,100,100);
                         System.Console.WriteLine(r);             
                     }
                 }
             }
            ";

Number of Errors: 1
ERROR The type or namespace name 'Drawing' does not exist in the namespace 'System' (are you missing an assembly reference?)

compilerParams.ReferencedAssemblies.Add("System.Drawing.Dll");

POST /accounts/ClientLogin HTTP/1.1
User-Agent: curl/7.15.1 (i486-pc-linux-gnu) libcurl/7.15.1
OpenSSL/0.9.8a zlib/1.2.3 libidn/0.5.18
Host: www.google.com
Accept: */*
Content-Length: 103
Content-Type: application/x-www-form-urlencoded
accountType=GOOGLE&Email=userName@google.com&Passwd=myPasswrd&source=curl-tester-1.0&service=analytics

HTTP/1.1 200 OK
Content-Type: text/plain
Cache-control: no-cache
Pragma: no-cache
Date: Mon, 02 Jun 2008 22:08:51 GMT
Content-Length: 497
SID=DQ...
LSID=DQAA...
Auth=DQAAAG8...

        string getSecurityToken()
       {
           if (string.IsNullOrEmpty(Email))
               throw new NullReferenceException("Email is required!");

           if (string.IsNullOrEmpty(Password))
               throw new NullReferenceException("Password is required!");

           WebRequest request = WebRequest.Create("https://www.google.com/accounts/ClientLogin");
           request.Method = "POST";

           string postData = "accountType=GOOGLE&Email=" + Email + "&Passwd=" + Password + "&service=analytics&source=vahid-testapp-1.0";
           byte[] byteArray = Encoding.ASCII.GetBytes(postData);

           request.ContentType = "application/x-www-form-urlencoded";
           request.ContentLength = byteArray.Length;

           using (Stream dataSt = request.GetRequestStream())
           {
               dataSt.Write(byteArray, 0, byteArray.Length);
           }

           string auth = string.Empty;
           using (WebResponse response = request.GetResponse())
           {
               using (Stream dataStream = response.GetResponseStream())
               {
                   using (StreamReader reader = new StreamReader(dataStream))
                   {
                       string responseFromServer = reader.ReadToEnd().Trim();
                       string[] tokens = responseFromServer.Split('\n');
                       foreach (string token in tokens)
                       {
                           if (token.StartsWith("SID="))
                               continue;

                           if (token.StartsWith("LSID="))
                               continue;

                           if (token.StartsWith("Auth="))
                           {
                               auth = token.Substring(5);
                           }
                           else
                           {
                               throw new AuthenticationException("Error authenticating Google user " + Email);
                           }
                       }
                   }
               }
           }

           return auth;

       }

       string getAvailableProfiles(string authToken)
       {
           return fetchPage("https://www.google.com/analytics/feeds/accounts/default", authToken);
       }

            string url = string.Format("https://www.google.com/analytics/feeds/data?ids={0}&metrics=ga:pageviews&start-date={1}&end-date={2}", id, from, to);
           return fetchPage(url, auth);

            CGoogleAnalytics cga = new CGoogleAnalytics
                                      {
                                          Email = "username@gmail.com",
                                          Password = "password",
                                          From = DateTime.Now.Subtract(TimeSpan.FromDays(1)),
                                          To = DateTime.Now.Subtract(TimeSpan.FromDays(1))
                                      };
           List<CGoogleAnalytics.SitePagePreviews> pagePreviews =
               cga.GetTotalNumberOfPageViews();

           foreach (var list in pagePreviews)
           {
               //string site = list.Site;
               //int pw = list.PagePreviews;
           }

private void btnProcessWithDoEvents_Click(object sender, EventArgs e)
{
for (int i = 0; i < 100000; i++)
{
  TextBox1.Text = "Processing " + i.ToString();
  Application.DoEvents();
}
}

private void btnStartTimer_Click(object sender, EventArgs e)
{
  this.timer1.Enabled = true;
  this.timer1.Start();
  this.timer1.Interval = 20;

}

private void timer1_Tick(object sender, EventArgs e)
{
  Thread.Sleep(50);
  Application.DoEvents();
}

using System.Collections.Generic; 


namespace EF_Sample07.DomainClasses
{
    public class Category
    {
        public int Id { get; set; }
        public virtual string Name { get; set; }
        public virtual string Title { get; set; } 

        public virtual ICollection<Product> Products { get; set; }
    }
} 

using System.ComponentModel.DataAnnotations; 


namespace EF_Sample07.DomainClasses
{
    public class Product
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public decimal Price { get; set; }         


        [ForeignKey("CategoryId")]
        public virtual Category Category { get; set; }
        public int CategoryId { get; set; }
    }
} 

using System.Data.Entity;
using System; 


namespace EF_Sample07.DataLayer.Context
{
    public interface IUnitOfWork
    {
        IDbSet<TEntity> Set<TEntity>() where TEntity : class;
        int SaveChanges();
    }
} 

using System.Data.Entity;
using EF_Sample07.DomainClasses; 


namespace EF_Sample07.DataLayer.Context
{
    public class Sample07Context : DbContext, IUnitOfWork
    {
        public DbSet<Category> Categories { set; get; }
        public DbSet<Product> Products { set; get; } 


        #region IUnitOfWork Members
        public new IDbSet<TEntity> Set<TEntity>() where TEntity : class
        {
            return base.Set<TEntity>();
        }
        #endregion
    }
} 

uow.Set<Product> 

using EF_Sample07.DomainClasses;
using System.Collections.Generic; 


namespace EF_Sample07.ServiceLayer
{
    public interface ICategoryService
    {
        void AddNewCategory(Category category);
        IList<Category> GetAllCategories();
    }
} 

using EF_Sample07.DomainClasses;
using System.Collections.Generic; 


namespace EF_Sample07.ServiceLayer
{
    public interface IProductService
    {
        void AddNewProduct(Product product);
        IList<Product> GetAllProducts();
    }
} 

using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using EF_Sample07.DataLayer.Context;
using EF_Sample07.DomainClasses; 


namespace EF_Sample07.ServiceLayer
{
    public class EfCategoryService : ICategoryService
    {
        IUnitOfWork _uow;
        IDbSet<Category> _categories;
        public EfCategoryService(IUnitOfWork uow)
        {
            _uow = uow;
            _categories = _uow.Set<Category>();
        } 


        public void AddNewCategory(Category category)
        {
            _categories.Add(category);
        } 


        public IList<Category> GetAllCategories()
        {
            return _categories.ToList();
        }
    }
} 

using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using EF_Sample07.DataLayer.Context;
using EF_Sample07.DomainClasses; 


namespace EF_Sample07.ServiceLayer
{
    public class EfProductService : IProductService
    {
        IUnitOfWork _uow;
        IDbSet<Product> _products;
        public EfProductService(IUnitOfWork uow)
        {
            _uow = uow;
            _products = _uow.Set<Product>();
        } 


        public void AddNewProduct(Product product)
        {
            _products.Add(product);
        } 


        public IList<Product> GetAllProducts()
        {
            return _products.Include(x => x.Category).ToList();
        }
    }
} 

using System.Collections.Generic;
using System.Data.Entity;
using EF_Sample07.DataLayer.Context;
using EF_Sample07.DomainClasses;
using EF_Sample07.ServiceLayer;
using StructureMap; 


namespace EF_Sample07
{
    class Program
    {
        static void Main(string[] args)
        {
            Database.SetInitializer(new MigrateDatabaseToLatestVersion<Sample07Context, Configuration>());


            HibernatingRhinos.Profiler.Appender.EntityFramework.EntityFrameworkProfiler.Initialize();
            ObjectFactory.Initialize(x =>
            {
                x.For<IUnitOfWork>().CacheBy(InstanceScope.Hybrid).Use<Sample07Context>();
                x.For<ICategoryService>().Use<EfCategoryService>();
            }); 


            var uow = ObjectFactory.GetInstance<IUnitOfWork>();
            var categoryService = ObjectFactory.GetInstance<ICategoryService>(); 


            var product1 = new Product { Name = "P100", Price = 100 };
            var product2 = new Product { Name = "P200", Price = 200 };
            var category1 = new Category
            {
                Name = "Cat100",
                Title = "Title100",
                Products = new List<Product> { product1, product2 }
            };
            categoryService.AddNewCategory(category1);
            uow.SaveChanges();            
        }
    }
} 

public enum InstanceScope
{
        PerRequest = 0,
        Singleton = 1,
        ThreadLocal = 2,
        HttpContext = 3,
        Hybrid = 4,
        HttpSession = 5,
        HybridHttpSession = 6,
        Unique = 7,
        Transient = 8,
} 

using System.Web.Mvc;
using EF_Sample07.DomainClasses;
using EF_Sample07.ServiceLayer;
using EF_Sample07.DataLayer.Context;
using System.Collections.Generic; 


namespace EF_Sample07.MvcAppSample.Controllers
{
    public class HomeController : Controller
    {
        IProductService _productService;
        ICategoryService _categoryService;
        IUnitOfWork _uow;
        public HomeController(IUnitOfWork uow, IProductService productService, ICategoryService categoryService)
        {
            _productService = productService;
            _categoryService = categoryService;
            _uow = uow;
        } 


        [HttpGet]
        public ActionResult Index()
        {
            var list = _productService.GetAllProducts();
            return View(list);
        }


        [HttpGet]
        public ActionResult Create()
        {
            ViewBag.CategoriesList = new SelectList(_categoryService.GetAllCategories(), "Id", "Name");
            return View();
        } 


        [HttpPost]
        public ActionResult Create(Product product)
        {
            if (this.ModelState.IsValid)
            {
                _productService.AddNewProduct(product);
                _uow.SaveChanges();
            }


            return RedirectToAction("Index");
        } 


        [HttpGet]
        public ActionResult CreateCategory()
        {
            return View();
        } 


        [HttpPost]
        public ActionResult CreateCategory(Category category)
        {
            if (this.ModelState.IsValid)
            {
                _categoryService.AddNewCategory(category);
                _uow.SaveChanges();
            }

            return RedirectToAction("Index");
        }
    }
} 

using System;
using System.Data.Entity;
using System.Web.Mvc;
using System.Web.Routing;
using EF_Sample07.DataLayer.Context;
using EF_Sample07.ServiceLayer;
using StructureMap; 


namespace EF_Sample07.MvcAppSample

{
    // Note: For instructions on enabling IIS6 or IIS7 classic mode, 
    // visit http://go.microsoft.com/?LinkId=9394801 


    public class MvcApplication : System.Web.HttpApplication
    {
        public static void RegisterGlobalFilters(GlobalFilterCollection filters)
        {
            filters.Add(new HandleErrorAttribute());
        } 


        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); 

            routes.MapRoute(
                "Default", // Route name
                "{controller}/{action}/{id}", // URL with parameters
                new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
            );
        } 


        protected void Application_Start()
        {
            Database.SetInitializer(new MigrateDatabaseToLatestVersion<Sample07Context, Configuration>());
            HibernatingRhinos.Profiler.Appender.EntityFramework.EntityFrameworkProfiler.Initialize();
            AreaRegistration.RegisterAllAreas();
            RegisterGlobalFilters(GlobalFilters.Filters);
            RegisterRoutes(RouteTable.Routes);
            initStructureMap();
        } 


        private static void initStructureMap()
        {
            ObjectFactory.Initialize(x =>
            {
                x.For<IUnitOfWork>().HttpContextScoped().Use(() => new Sample07Context());
                x.ForRequestedType<ICategoryService>().TheDefaultIsConcreteType<EfCategoryService>();
                x.ForRequestedType<IProductService>().TheDefaultIsConcreteType<EfProductService>();
            });


            //Set current Controller factory as StructureMapControllerFactory
            ControllerBuilder.Current.SetControllerFactory(new StructureMapControllerFactory());
        } 


        protected void Application_EndRequest(object sender, EventArgs e)
        {
            ObjectFactory.ReleaseAndDisposeAllHttpScopedObjects();
        }
    } 


    public class StructureMapControllerFactory : DefaultControllerFactory
    {
        protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
        {
            return ObjectFactory.GetInstance(controllerType) as Controller;
        }
    }
} 

using System;
using System.Data.Entity;
using EF_Sample07.DataLayer.Context;
using EF_Sample07.ServiceLayer;
using StructureMap; 


namespace EF_Sample07.WebFormsAppSample
{
    public class Global : System.Web.HttpApplication
    {
        private static void initStructureMap()
        {
            ObjectFactory.Initialize(x =>
            {
                x.For<IUnitOfWork>().HttpContextScoped().Use(() => new Sample07Context());
                x.ForRequestedType<ICategoryService>().TheDefaultIsConcreteType<EfCategoryService>();
                x.ForRequestedType<IProductService>().TheDefaultIsConcreteType<EfProductService>(); 

                x.SetAllProperties(y=>
                {
                    y.OfType<IUnitOfWork>();
                    y.OfType<ICategoryService>();
                    y.OfType<IProductService>();
                });
            });
        } 


        void Application_Start(object sender, EventArgs e)
        {
            Database.SetInitializer(new MigrateDatabaseToLatestVersion<Sample07Context, Configuration>());
            HibernatingRhinos.Profiler.Appender.EntityFramework.EntityFrameworkProfiler.Initialize();
            initStructureMap();
        } 


        void Application_EndRequest(object sender, EventArgs e)
        {
            ObjectFactory.ReleaseAndDisposeAllHttpScopedObjects();
        } 

using System.Web.UI;
using StructureMap; 


namespace EF_Sample07.WebFormsAppSample
{
    public class BasePage : Page
    {
        public BasePage()
        {
            ObjectFactory.BuildUp(this);
        }
    }
} 

using System;
using EF_Sample07.DataLayer.Context;
using EF_Sample07.DomainClasses;
using EF_Sample07.ServiceLayer; 


namespace EF_Sample07.WebFormsAppSample
{
    public partial class AddProduct : BasePage
    {
        public IUnitOfWork UoW { set; get; }
        public IProductService ProductService { set; get; }
        public ICategoryService CategoryService { set; get; } 


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


        private void bindToCategories()
        {
            ddlCategories.DataTextField = "Name";
            ddlCategories.DataValueField = "Id";
            ddlCategories.DataSource = CategoryService.GetAllCategories();
            ddlCategories.DataBind();
        } 


        protected void btnAdd_Click(object sender, EventArgs e)
        {
            var product = new Product
            {
                Name = txtName.Text,
                Price = int.Parse(txtPrice.Text),
                CategoryId = int.Parse(ddlCategories.SelectedItem.Value)
            };
            ProductService.AddNewProduct(product);
            UoW.SaveChanges();
            Response.Redirect("~/Default.aspx");
        }
    }
}