1. کلاس دربرگیرنده متد یا متدهای الحاقی باید Public و Static باشد.
2. متد الحاقی باید Public و Static باشد.
3. اولین پارامتر متد الحاقی باید با کلمه کلیدی this همراه باشد و این پارامتر اشاره به کلاسی دارد که متد جاری به آن الحاق (یا ضمیمه) خواهد شد.

سپس یک کلاس جدید ساخته و با ارث بری از ActionFilterAttribute، کار ساخت فیلتر را آغاز میکنیم:

 Content-Security-Policy: script-src 'self'
X-WebKit-CSP: script-src 'self'
X-Content-Security-Policy: script-src 'self'

 Content-Security-Policy: script-src 'self' https://youcdn.com
X-WebKit-CSP: script-src 'self' https://yourcdn.com
X-Content-Security-Policy: script-src 'self' https://yourcdn.com

 Content-Security-Policy: default-src 'self' https://youcdn.com
X-WebKit-CSP: default-src 'self' https://yourcdn.com
X-Content-Security-Policy: default-src 'self' https://yourcdn.com

using System;
using System.Web;

namespace AntiXssHeaders
{
    public class SecurityHeadersConstants
    {
        public static readonly string XXssProtectionHeader = "X-XSS-Protection";
        public static readonly string XFrameOptionsHeader = "X-Frame-Options";
        public static readonly string XWebKitCspHeader = "X-WebKit-CSP";
        public static readonly string XContentSecurityPolicyHeader = "X-Content-Security-Policy";
        public static readonly string ContentSecurityPolicyHeader = "Content-Security-Policy";
        public static readonly string XContentTypeOptionsHeader = "X-Content-Type-Options";
    }

    public class ContentSecurityPolicyModule : IHttpModule
    {
        public void Dispose()
        { }

        public void Init(HttpApplication app)
        {
            app.BeginRequest += AppBeginRequest;
        }

        void AppBeginRequest(object sender, EventArgs e)
        {
            var app = (HttpApplication)sender;
            var response = app.Context.Response;
            setHeaders(response);
        }

        private static void setHeaders(HttpResponse response)
        {
            response.Headers.Set(SecurityHeadersConstants.XFrameOptionsHeader, "SameOrigin");

            // For IE 8+
            response.Headers.Set(SecurityHeadersConstants.XXssProtectionHeader, "1; mode=block");
            response.Headers.Set(SecurityHeadersConstants.XContentTypeOptionsHeader, "nosniff");

            //todo: Add /Home/Report --> public JsonResult Report() { return Json(true); }

            const string cspValue = "default-src 'self';";
            // For Chrome 16+
            response.Headers.Set(SecurityHeadersConstants.XWebKitCspHeader, cspValue);

            // For Firefox 4+
            response.Headers.Set(SecurityHeadersConstants.XContentSecurityPolicyHeader, cspValue);
            response.Headers.Set(SecurityHeadersConstants.ContentSecurityPolicyHeader, cspValue);
        }
    }
}

//// RegisterGlobalFilters -> filters.Add(new ContentSecurityPolicyFilterAttribute());
public class ContentSecurityPolicyFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        var response = filterContext.HttpContext.Response;
        response.AddHeader("Content-Security-Policy", "script-src 'self'");
        // the rest ...
        base.OnActionExecuting(filterContext);
    }
}

 public class User
    {
        public int Id { get; set; }
       
        public string FirstName { get; set; }

        public string LastName { get; set; }

        public string UserName { get; set; }

        public string Password { get; set; }

        public bool IsAdmin { get; set; }

        public virtual ICollection<BlogPost> BlogPosts { get; set; }
    }

 public class UserViewModel
    {
        public string FirstName { get; set; }

        public string LastName { get; set; }

        public string Password { get; set; }
    }

public ActionResult Index(int id = 1)
        {
            var user = _userService.GetById(id);
            var userViewModel = new UserViewModel
                {
                    FirstName = user.FirstName,
                    LastName = user.LastName,
                    Password = user.Password
                };

            return View(userViewModel);
        }

PM> Install-Package AutoMapper

public static class AutoMapperWebConfiguration
    {

        public static void Configure()
        {
            ConfigureUserMapping();
        }

        private static void ConfigureUserMapping()
        {
            Mapper.CreateMap<User, UserViewModel>();
        }
    }

public ActionResult Index(int id=1)
        {
            var user = _userService.GetById(id);
            var userViewModel=new UserViewModel();
            AutoMapper.Mapper.Map(user, userViewModel);
            
            return View(userViewModel);
        }

USE [Coordinates]
GO
CREATE TABLE [dbo].[Coords2](
[top] [int] NULL,
[left] [int] NULL,
[width] [int] NULL,
[height] [int] NULL,
[text] [nvarchar](50) NULL,
[id] [uniqueidentifier] NULL,
[editable] [bit] NULL
) ON [PRIMARY]
GO

public class Coords
{
    public string top;
    public string left;
    public string width;
    public string height;
    public string text;
    public string id;
    public string editable;

    public Coords(string top, string left, string width, string height, string text, string id, string editable)
    {
        this.top = top;
        this.left = left;
        this.width = width;
        this.height = height;
        this.text = text;
        this.id = id;
        this.editable = editable;


    }
}

[WebMethod]
    public static List<Coords> GetDynamicContext(string entryId, string entryName)
    {
        List<Coords> CoordsList = new List<Coords>();

        string connect = "Connection String";
        using (SqlConnection conn = new SqlConnection(connect))
        {
            string query = "SELECT [top], [left], width, height, text, id, editable FROM  Coords2";
            using (SqlCommand cmd = new SqlCommand(query, conn))
            {
                conn.Open();
                using (SqlDataReader reader=cmd.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        CoordsList.Add(new Coords(reader["top"].ToString(), reader["left"].ToString(),
                                                  reader["width"].ToString(), reader["height"].ToString(),
                                                  reader["text"].ToString(), reader["id"].ToString(),
                                                  reader["editable"].ToString()));
                    }
                }
               
               conn.Close();
            }
        }

         return CoordsList;


    }

$.fn.annotateImage.ajaxLoad = function (image) {
        ///<summary>
        ///Loads the annotations from the "getUrl" property passed in on the
        ///     options object.
        ///</summary>
      
        $.ajax({
            type: "POST",
            contentType: "application/json; charset=utf-8",
            url: "Default.aspx/GetDynamicContext",
            data: "{'entryId': '" + 1 + "','entryName': '" + 2 + "'}",
            dataType: "json",
            success: function (msg) {
                image.notes = msg.d;
                $.fn.annotateImage.load(image);
            }
        });



 }; 

 $.fn.SaveCoords = function (note) {
        $.ajax({
            type: "POST",
            contentType: "application/json; charset=utf-8",
            url: "Default.aspx/SaveCoords",
            data: "{'top': '" + note.top + "','left': '" + note.left + "','width': '" + note.width + "','height': '" + note.height + "','text': '" + note.text + "','id': '" + note.id + "','editable': '" + note.editable + "'}",
            dataType: "json",
            success: function (msg) {
                note.id = msg.d;
             }
        });



 };




 $.fn.annotateView.prototype.edit = function () {

        ///<summary>

        ///Edits the annotation.

        ///</summary>      

        if (this.image.mode == 'view') {

            this.image.mode = 'edit';

            var annotation = this;

            // Create/prepare the editable note elements

            var editable = new $.fn.annotateEdit(this.image, this.note);

            $.fn.annotateImage.createSaveButton(editable, this.image, annotation);

            // Add the delete button

            var del = $('<a>حذف</a>');

            del.click(function () {

                var form = $('#image-annotate-edit-form form');

                $.fn.annotateImage.appendPosition(form, editable)

                if (annotation.image.useAjax) {

                    $.ajax({

                        type: "POST",

                        contentType: "application/json; charset=utf-8",

                        url: "Default.aspx/DeleteCoords",

                        //                        url: annotation.image.deleteUrl,

                        //                        data: form.serialize(),

                        data: "{'id': '" + editable.note.id + "'}",

                        dataType: "json",

                        success: function (msg) {

                            //                image.notes = msg.d;

                            //                $.fn.annotateImage.load(image);

                        },

                        error: function (e) { alert("An error occured deleting that note.") }

                    });

                }

                annotation.image.mode = 'view';

                editable.destroy();

                annotation.destroy();

            });

            editable.form.append(del);

            $.fn.annotateImage.createCancelButton(editable, this.image);

        }

    };

public Task Send(string message)
{
    return Clients.All.InvokeAsync("Send", message);
}

var context = new Models.EntitiesConnection();
var query = context.Posts.Select(pst => new {
             id = pst.id, 
             Title = pst.Title, 
             GNames = pst.GroupsDetails.Select(grd => new { Name = grd.PostGroup.name }) 
             })
             .OrderByDescending(c => c.id)
             .ToList();

public bool myfunc(List<Post> query)
        {
            foreach (var item in query)
            {
            .....  string title =  item.Title;
            }
...return true;
        }
.
.
.

var context = new Models.EntitiesConnection();
var queryx = context.Posts.ToList();
.... myfunc(queryx );

        public static List<T> CreateGenericListFromAnonymous<T>(object obj, T example)
        {
            return (List<T>)obj;
        }
        public static IEnumerable<T> CreateEmptyAnonymousIEnumerable<T>(T example)
        {
            return new List<T>(); ;
        }

////

        public bool myfunc(object query)
        {
            var cquery = CreateGenericListFromAnonymous(query, 
                              new { 
                                       id = 0, 
                                       Title = string.Empty, 
                                       GNames = CreateEmptyAnonymousIEnumerable(new { Name = string.Empty }) 
                              });
            foreach (var item in cquery)
            {
                string title = item.Title;
                foreach (var gname in item.GNames)
                {
                    string gn = gname.Name;
                }
.
.
.
            }
            return false;
        }

.
.
.
var context = new Models.EntitiesConnection();
var query = context.Posts.Select(pst => new
                              { 
                                   id = pst.id, 
                                   Title = pst.Title,
                                   GNames = pst.GroupsDetails.Select(grd => new { Name = grd.PostGroup.name }) 
                             }).OrderByDescending(c => c.id);
            myfunc(query.ToList());

public class Rectangle
{
    public int Length { get; set; }
    public int Height { get; set; }

    public void Grow(int length, int height)
    {
        Length += length;
        Height += height;
    }
}

Rectangle r = new Rectangle();
r.Length = 5;
r.Height = 10;
r.Grow(10, 10);// r.Length is 15, r.Height is 20, same instance of r

// After
public class ImmutableRectangle
{
    int Length { get; }
    int Height { get; }

    public ImmutableRectangle(int length, int height)
    {
        Length = length;
        Height = height;
    }

    public ImmutableRectangle Grow(int length, int height) =>
          new ImmutableRectangle(Length + length, Height + height);
}

ImmutableRectangle r = new ImmutableRectangle(5, 10);
r = r.Grow(10, 10);// r.Length is 15, r.Height is 20, is a new instance of r

public static void Main()
{
    Console.WriteLine(GetSalutation(DateTime.Now.Hour));
}

// imparitive, mutates state to produce a result
/*public static string GetSalutation(int hour)
{
    string salutation; // placeholder value

    if (hour < 12)
        salutation = "Good Morning";
    else
        salutation = "Good Afternoon";

    return salutation; // return mutated variable
}*/

public static string GetSalutation(int hour) => hour < 12 ? "Good Morning" : "Good Afternoon";

public static int Count<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
{
    int count = 0;

    foreach (TSource element in source)
    {
        checked
        {
            if (predicate(element))
            {
                count++;
            }
        }
    }

    return count;
}

public static class Extensions
{
    public static Func<T, TReturn2> Compose<T, TReturn1, TReturn2>(this Func<TReturn1, TReturn2> func1, Func<T, TReturn1> func2)
    {
        return x => func1(func2(x));
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        Func<int, int> square = (x) => x * x;
        Func<int, int> negate = x => x * -1;
        Func<int, string> toString = s => s.ToString();
        Func<int, string> squareNegateThenToString = toString.Compose(negate).Compose(square);
        Console.WriteLine(squareNegateThenToString(2));
    }
}

string str = new StringBuilder()
  .Append("Hello ")
  .Append("World ")
  .ToString()
  .TrimEnd()
  .ToUpper();

public static class Extensions
{
    public static StringBuilder AppendWhen(this StringBuilder sb, string value, bool predicate) => predicate ? sb.Append(value) : sb;
}

public class Program
{
    public static void Main(string[] args)
    {
        // Extends the StringBuilder class to accept a predicate
        string htmlButton = new StringBuilder().Append("<button").AppendWhen(" disabled", false).Append(">Click me</button>").ToString();
    }
}

public static void Main()
{
    int[] a = { 1, 2, 3, 4, 5 };

    foreach (int n in GreaterThan(a, 3))
    {
        Console.WriteLine(n);
    }
}


/*public static IEnumerable<int> GreaterThan(int[] arr, int gt)
{
    List<int> temp = new List<int>();
    foreach (int n in arr)
    {
        if (n > gt) temp.Add(n);
    }
    return temp;
}*/

public static IEnumerable<int> GreaterThan(int[] arr, int gt)
{
    foreach (int n in arr)
    {
        if (n > gt) yield return n;
    }
}

List<int> collection = new List<int> { 1, 2, 3, 4, 5 };

// Imparative style of programming is verbose
List<int> results = new List<int>();

foreach(var num in collection)
{
  if (num % 2 != 0) results.Add(num);
}

// Declarative is terse and beautiful
var results = collection.Where(num => num % 2 != 0);

public void SendMessage(string message, string id)
{
      Clients.reciveMessage(message, Users[id]);
}

export interface IProduct {
    productId: number;
    productName: string;
    productCode: string;
    releaseDate: string;
    price: number;
    description: string;
    starRating: number;
    imageUrl: string;
}

import { Component } from 'angular2/core';
import { IProduct } from './product';
 
@Component({
    selector: 'pm-products',
    templateUrl: 'app/products/product-list.component.html'
})
export class ProductListComponent {
    // as before ...

    products: IProduct[] = [
        // as before ...
    ]; 

    // as before ...
}

 @Component({
    //...
    styles: ['thead {color: blue;}']
})

 @Component({
     //...
     styleUrls: ['app/products/product-list.component.css']
})

thead {
  color: #337AB7;
}

@Component({
    selector: 'pm-products',
    templateUrl: 'app/products/product-list.component.html',
    styleUrls: ['app/products/product-list.component.css']
})
export class ProductListComponent {
   //...

 export class ProductListComponent implements OnInit {

 import { Component, OnInit } from 'angular2/core';

ngOnInit(): void {
    console.log('In OnInit');
}

import { PipeTransform, Pipe } from 'angular2/core';
import { IProduct } from './product';
 
@Pipe({
    name: 'productFilter'
})
export class ProductFilterPipe implements PipeTransform {
 
    transform(value: IProduct[], args: string[]): IProduct[] {
        let filter: string = args[0] ? args[0].toLocaleLowerCase() : null;
        return filter ? value.filter((product: IProduct) =>
            product.productName.toLocaleLowerCase().indexOf(filter) != -1) : value;
    }
}

 <tr *ngFor='#product of products | productFilter:listFilter'>

 <input type='text'  [(ngModel)]='listFilter' />

import { Component, OnInit } from 'angular2/core';
import { IProduct } from './product';
import { ProductFilterPipe } from './product-filter.pipe';
 
@Component({
    selector: 'pm-products',
    templateUrl: 'app/products/product-list.component.html',
    styleUrls: ['app/products/product-list.component.css'],
    pipes: [ProductFilterPipe]
})
export class ProductListComponent implements OnInit {
   //...