static void Main()
{
 int factor = 2;
 Func<int, int> multiplier = n => n * factor;
 Console.WriteLine (multiplier (3)); // 6
}

int factor = 2;
Func<int, int> multiplier = n => n * factor;
factor = 10;
Console.WriteLine (multiplier (3)); // 30

int seed = 0;
Func<int> natural = () => seed++;
Console.WriteLine (natural()); // 0
Console.WriteLine (natural()); // 1
Console.WriteLine (seed); // 2

static Func<int> Natural()
{
 int seed = 0;
 return () => seed++; // Returns a closure
}
static void Main()
{
 Func<int> theNatural = Natural();
 Console.WriteLine (theNatural ()); // 0
 Console.WriteLine (theNatural ()); // 1
}

static Func<int> Natural()
{
 return() => { int seed = 0; return seed++; };
}
static void Main()
{
 Func<int> natural = Natural();
 Console.WriteLine (natural()); // 0
 Console.WriteLine (natural()); // 0
}

Action[] actions = new Action[3];
for (int i = 0; i < 3; i++)
actions [i] = () => Console.Write (i);
foreach (Action a in actions) a(); // 333

Action[] actions = new Action[3];
int i = 0;
actions[0] = () => Console.Write (i);
i = 1;
actions[1] = () => Console.Write (i);
i = 2;
actions[2] = () => Console.Write (i);
i = 3;
foreach (Action a in actions) a(); // 333

Action[] actions = new Action[3];
for (int i = 0; i < 3; i++)
{
 int loopScopedi = i;
 actions [i] = () => Console.Write (loopScopedi);
}
foreach (Action a in actions) a(); // 012

(function () {
    var itemCtx = {};
    itemCtx.Templates = {};
    itemCtx.Templates.Header = "<div><b title=\"اطلاعات فیلم ها\">Movie Data</b></div><ul>";
    itemCtx.Templates.Item = MyOverrideTemplate;
    itemCtx.Templates.Footer = "</ul>";
    itemCtx.BaseViewID = 1;
    itemCtx.ListTemplateType = 100; 
//For Generic List (More : http://msdn.microsoft.com/en-us/library/ms462947(v=office.12).aspx)

    SPClientTemplates.TemplateManager.RegisterTemplateOverrides(itemCtx);

})();



function GT(val , index)
{
    // example of val : 60 %
    var temp = val.split(' ')[0];
    var v = Number(temp);
    return v > index;
}

function LT(val, index) {
    var temp = val.split(' ')[0];
    var v = Number(temp);
    return v < index;
}

function EQ(val, index) {
    var temp = val.split(' ')[0];
    var v = Number(temp);
    return v == index;
}



function MyOverrideTemplate(ctx) {

   

    if (LT(ctx.CurrentItem.PopularityPercent ,25))
    {
        return "<li title='خیلی کم بازدید' style='color:white;background-color: red;width: 300px;height: 24px;'>" +
            ctx.CurrentItem.Title + " – " + ctx.CurrentItem.PopularityPercent + "</li>";
    }
    else
    if (LT(ctx.CurrentItem.PopularityPercent ,50))
    {
        return "<li title='کم بازدید'  style='color:maroon;background-color: #ffcc00;width: 300px;height: 24px;'>" +
            ctx.CurrentItem.Title + " – " + ctx.CurrentItem.PopularityPercent + "</li>";
    }
    else
    if (LT(ctx.CurrentItem.PopularityPercent ,75))
    {
        return "<li title='بازدید معمولی'  style='color:#ffcc00;background-color: maroon;width: 300px;height: 24px;'>" +
            ctx.CurrentItem.Title + " – " + ctx.CurrentItem.PopularityPercent + "</li>";
    }
    else
    if (LT(ctx.CurrentItem.PopularityPercent ,95))
    {
        return "<li title='پر بازدید'  style='color:yellow;background-color: blue;width: 300px;height: 24px;'>" +
            ctx.CurrentItem.Title + " – " + ctx.CurrentItem.PopularityPercent + "</li>";
    }
    else
        if (EQ(ctx.CurrentItem.PopularityPercent, 100)) {
            return "<li  title='بالاترین بازدید'  style='color:black;background-color: green;width: 300px;height: 24px;'>" +
                ctx.CurrentItem.Title + " – " + ctx.CurrentItem.PopularityPercent + "</li>";
        }
        else {
            return "<li title='نامعلوم'  style='color:navy;background-color: yellow;width: 300px;height: 24px;'>" +
                ctx.CurrentItem.Title + " – " + ctx.CurrentItem.PopularityPercent + "</li>";
        }
}

~site/_catalogs/masterpage/MyJsLinkSample.js

namespace Refactoring.Day1.EncapsulateCollection
{
    public class OrderItem
    {
        public int Id { set; get; }
        public string Name { set; get; }
        public int Amount { set; get; }
    }
}

using System.Collections.Generic;

namespace Refactoring.Day1.EncapsulateCollection
{    
    public class Orders
    {
        public List<OrderItem> OrderItems { set; get; }
    }
}

Error, Certainty 95, for Do Not Expose Generic Lists

Warning, Certainty 75, for Collection Properties Should Be ReadOnly

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

namespace Refactoring.Day1.EncapsulateCollection
{
    public class Orders
    {
        private int _orderTotal;
        private List<OrderItem> _orderItems;

        public IEnumerable<OrderItem> OrderItems
        {
            get { return _orderItems; }
        }

        public void AddOrderItem(OrderItem orderItem)
        {
            _orderTotal += orderItem.Amount;
            _orderItems.Add(orderItem);
        }

        public void RemoveOrderItem(OrderItem orderItem)
        {
            var order = _orderItems.Find(o => o == orderItem);
            if (order == null) return;

            _orderTotal -= orderItem.Amount;
            _orderItems.Remove(orderItem);
        }
    }
}

using System;
using System.Collections.Generic;
using Google.GData.Client;

namespace BloggerAutoPoster
{
    public class BloggerAutoPoster
    {
        public string UserName { set; get; }

        public string Password { set; get; }

        public string PostTitle { set; get; }

        public IList<string> PostTags { set; get; }

        public string PostBody { set; get; }

        public string BlogUrl { set; get; }

        public bool PostAsDraft { set; get; }

        public bool PostNewEntry()
        {
            var service = new Service("blogger", "blogger-example")
                {
                    Credentials = new GDataCredentials(UserName, Password)
                };
            var newPost = constructNewEntry();
            var result = service.Insert(new Uri(BlogUrl), newPost);
            return result != null;
        }

        private AtomEntry constructNewEntry()
        {
            var newPost = new AtomEntry
                {
                    Title = { Text = PostTitle },
                    Content = new AtomContent
                              {
                                  Content = string.Format(@"<div xmlns=""http://www.w3.org/1999/xhtml"">{0}</div>", PostBody),
                                  Type = "xhtml"
                              },
                    IsDraft = PostAsDraft
                };

            foreach (var tag in PostTags)
            {
                newPost.Categories.Add(
                    new AtomCategory
                    {
                        Term = tag,
                        Scheme = "http://www.blogger.com/atom/ns#"
                    });
            }

            return newPost;
        }
    }
}

new BloggerAutoPoster
{
      BlogUrl = "https://www.blogger.com/feeds/number/posts/default",
      UserName = "name@gmail.com",
      Password = "pass",
      PostTitle = "بررسی ارسل خودکار-3",
      PostTags = new List<string> { "بررسی ارسال خودکار" },
      PostBody = "تست می‌شود123",
      PostAsDraft = false
}.PostNewEntry();

using System;
using System.Collections.Generic;
using System.Linq;
using Google.GData.Client;

namespace BloggerAutoPoster
{
    public class BlogInfo
    {
        public string Title { set; get; }
        public string Url { set; get; }
    }

    public class BloggerInfo
    {
        public static IList<BlogInfo> FindMyBlogsUrls(string username, string password)
        {
            var result = new List<BlogInfo>();

            var service = new Service("blogger", "blogger-example")
            {
                Credentials = new GDataCredentials(username, password)
            };

            var query = new FeedQuery { Uri = new Uri("https://www.blogger.com/feeds/default/blogs") };
            var feed = service.Query(query);

            if (feed == null)
                throw new NotSupportedException("You don't have any blogs!");

            foreach (var entry in feed.Entries)
            {
                result.AddRange(entry.Links.Where(t => t.Rel.Equals("http://schemas.google.com/g/2005#post"))
                                           .Select(t => new BlogInfo
                                                        {
                                                            Url = new Uri(t.HRef.ToString()).AbsoluteUri,
                                                            Title = entry.Title.Text
                                                        }));
            }

            return result;
        }
    }
}

[ServiceContract]
public interface IService1
{
    [OperationContract]
    Order InsertOrder();
    [OperationContract]
    void UpdateOrderWithoutRetrieving(Order order);
    [OperationContract]
    void UpdateOrderByRetrieving(Order order);
}

به عبارت دیگر با اعمال  [Crystal Zheng].parent، به کد پستی مشتری دسترسی پیدا کرده ایم (برای درک بیشتر در زیر ساختار سلسله مراتبی موقعیت جغرافیایی مشتریان را ببینید) و سپس با اعمال .children  به تمامی مشتریان موجود در آن کد پستی رسیده ایم؛ که عملا همان برادران  [Crystal Zheng] می باشند. 

در زیر یک کوئری ترکیبی با استفاده از دو تابع   ancestor و   descendants نوشته شده است.  

using System;

public class ControlChars
{
   public static void Main()
   {
      int charsWritten = 0;

      for (int ctr = 0x00; ctr <= 0xFFFF; ctr++)
      {
         char ch = Convert.ToChar(ctr);
         if (char.IsControl(ch))
         {
            Console.Write(@"\U{0:X4}    ", ctr);
            charsWritten++;
            if (charsWritten % 6 == 0)
               Console.WriteLine();
         }     
      }  
   }
}
// The example displays the following output to the console: 
//       \U0000    \U0001    \U0002    \U0003    \U0004    \U0005 
//       \U0006    \U0007    \U0008    \U0009    \U000A    \U000B 
//       \U000C    \U000D    \U000E    \U000F    \U0010    \U0011 
//       \U0012    \U0013    \U0014    \U0015    \U0016    \U0017 
//       \U0018    \U0019    \U001A    \U001B    \U001C    \U001D 
//       \U001E    \U001F    \U007F    \U0080    \U0081    \U0082 
//       \U0083    \U0084    \U0085    \U0086    \U0087    \U0088 
//       \U0089    \U008A    \U008B    \U008C    \U008D    \U008E 
//       \U008F    \U0090    \U0091    \U0092    \U0093    \U0094 
//       \U0095    \U0096    \U0097    \U0098    \U0099    \U009A 
//       \U009B    \U009C    \U009D    \U009E    \U009F