public class StructureMapGlobalFilterProvider : IFilterProvider
    {
        public StructureMapGlobalFilterProvider(IContainer container, GlobalFilterRegistrationList filterList)
        {
            _container = container;
            _filterList = filterList;
        }

        private IContainer _container;
        private GlobalFilterRegistrationList _filterList;

        public IEnumerable<Filter> GetFilters(ControllerContext controllerContext, ActionDescriptor actionDescriptor)
        {
            var filters = new List<Filter>();
            if (_filterList == null || _filterList.Count == 0)
                return filters;
            foreach (GlobalFilterRegistration registration in _filterList)
            {
                var actionFilter = _container.GetInstance(registration.Type);
                var filter = new Filter(actionFilter, FilterScope.Global, registration.Order);
                filters.Add(filter);
            }
            return filters;
        }
    }

    public class GlobalFilterRegistration
    {
        public Type Type { get; set; }
        public int? Order { get; set; }
    }

    public class GlobalFilterRegistrationList : List<GlobalFilterRegistration>
    {
    }

 var globalFilterRegistrationList = new GlobalFilterRegistrationList
                {
                    new GlobalFilterRegistration
                    {
                        Type = typeof (LogAttribute),
                        Order
                            = 1
                    }
                };
                container.Configure(x =>
                {
                    x.For<IFilterProvider>().Use<StructureMapGlobalFilterProvider>();
                    x.For<GlobalFilterRegistrationList>().Use(globalFilterRegistrationList);
                });

SELECT * FROM table
ORDER BY NEWID()

using System;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Linq;

namespace Sample
{
    public class User
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public int Age { get; set; }
    }

    public class MyContext : DbContext
    {
        public DbSet<User> Users { get; set; }
    }

    public class Configuration : DbMigrationsConfiguration<MyContext>
    {
        public Configuration()
        {
            AutomaticMigrationsEnabled = true;
            AutomaticMigrationDataLossAllowed = true;
        }

        protected override void Seed(MyContext context)
        {
            context.Users.Add(new User { Name = "User 1", Age = 20 });
            context.Users.Add(new User { Name = "User 2", Age = 25 });
            context.Users.Add(new User { Name = "User 3", Age = 30 });
            context.Users.Add(new User { Name = "User 4", Age = 35 });
            context.Users.Add(new User { Name = "User 5", Age = 40 });
            base.Seed(context);
        }
    }

    public static class Test
    {
        public static void RunTests()
        {
            Database.SetInitializer(new MigrateDatabaseToLatestVersion<MyContext, Configuration>());

            using (var context = new MyContext())
            {
               var randomListOfUsers =
                        context.Users
                               .Where(person => person.Age >= 25 && person.Age < 40)
                               .OrderBy(person => Guid.NewGuid())
                               .ToList();

               foreach (var person in randomListOfUsers)
                   Console.WriteLine("{0}:{1}", person.Name, person.Age);
            }
        }
    }
}

.OrderBy(person => Guid.NewGuid())

ORDER BY NEWID()

SELECT 
[Project1].[Id] AS [Id], 
[Project1].[Name] AS [Name], 
[Project1].[Age] AS [Age]
FROM ( SELECT 
NEWID() AS [C1], ------ Guid created here
[Extent1].[Id] AS [Id], 
[Extent1].[Name] AS [Name], 
[Extent1].[Age] AS [Age]
FROM [dbo].[Users] AS [Extent1]
WHERE ([Extent1].[Age] >= 25) AND ([Extent1].[Age] < 40)
)  AS [Project1]
ORDER BY [Project1].[C1] ASC  ------ Used for sorting here

 public static IEnumerable<TResult> OfType<TResult>(this IEnumerable source)

Apple
Sugar

Milk
Water

 Unhandled Exception: System.InvalidCastException: Unable to cast object of type 'System.Int32' to type 'System.String'.

 IEnumerable<string> input = new List<string> { "Apple", "Sugar", "Flour" };
string[] array = input.ToArray();

 IEnumerable<string> input = new[] { "Apple", "Sugar", "Flour" };
List<string> list = input.ToList();

Key=1, Recipe=Apple Pie
Key=2, Recipe=Cherry Pie
Key=3, Recipe=Beef Pie

 Rating 5
 - Apple Pie
 - Banana Pie
Rating 2
 - Cherry Pie
Rating 3
 - Beef Pie

 Sugar

 Milk

 Unhandled Exception: System.InvalidOperationException: Sequence contains no elements

Ingredient[] ingredients = { };
Ingredient element = ingredients.First();

 Unhandled Exception: System.InvalidOperationException: Sequence contains no matching element

 Ingredient[] ingredients = { };
Ingredient element = ingredients.FirstOrDefault();
Console.WriteLine(element == null);

 True

 True

 Flour

Unhandled Exception: System.InvalidOperationException: Sequence contains more than one matching element
Unhandled Exception: System.InvalidOperationException: Sequence contains no matching element

 Sugar

 Butter

True

 Milk

 System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.

 True

Sugar
Egg
Milk

 True

public class CustomProfile
    {
        [Required(ErrorMessage="*")]
        [StringLength(50)]
        [System.Web.Mvc.Remote(action: "CheckUserName",
                                       controller: "User",
                                       HttpMethod = "POST",
                                       ErrorMessage = "این نام کاربری وجود دارد")]
        public string Username{ get; set; }
        [Required(ErrorMessage = "*")]
        public string Password{ get; set; }
        [Required(ErrorMessage = "*")]
        public string FirstName{ get; set; }
        [Required(ErrorMessage = "*")]
        public string LastName{ get; set; }
        
        [Required(ErrorMessage = "*")]
        [StringLength(10, ErrorMessage = "کدملی باید 10 رقم باشد")]
        public string NationalCode { get; set; }
        [Required(ErrorMessage = "*")]
        public string Address { get; set; }

        [RegularExpression(@"\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*",
                           ErrorMessage = "آدرس ایمیل معتبر نیست")]
        [System.Web.Mvc.Remote(action: "CheckEmail",
                                       controller: "User",
                                       AdditionalFields = "Username",
                                       HttpMethod = "POST",
                                       ErrorMessage = "این ایمیل وجود دارد")]
        public string Email{ get; set; }

        [StringLength(11, ErrorMessage = "تلفن باید 11 رقم باشد")]
        public string PhoneNo{ get; set; }

        [StringLength(11, ErrorMessage = "موبایل باید 11 رقم باشد")]
        public string MobileNo{ get; set; }
        
        
        public string[] Roles{ get; set; }
        
        public string LastActivityDate{ get; set; }
        public string LastLoginDate { get; set; }
        public string CreationDate { get; set; }
        public bool IsLockedOut{ get; set; }
    }

@model Sama.Models.CustomProfile
@{
    ViewBag.Title = "Create";
    Layout = "~/Views/Shared/_Layout.cshtml";
    
}
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>
@using (Html.BeginForm(actionName: "Create", controllerName: "User"))
    {
        @Html.ValidationSummary(true)
     
        <fieldset>
            <legend>کاربر جدید</legend>
            <div>
                <table>
                    <tr>
                        <td>
                            <div>
                                @Html.LabelFor(model => model.Username, "نام کاربری")
                            </div>
                        </td>
                        <td>
                            <div>
                                @Html.EditorFor(model => model.Username)
                                @Html.ValidationMessageFor(model => model.Username)
                            </div>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <div>
                                @Html.LabelFor(model => model.Password, "کلمه عبور")
                            </div>
                        </td>
                        <td>
                            <div>
                                @Html.PasswordFor(model => model.Password)
                                @Html.ValidationMessageFor(model => model.Password)
                            </div>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <div>
                                @Html.LabelFor(model => model.FirstName, "نام")
                            </div>
                        </td>
                        <td>
                            <div>
                                @Html.EditorFor(model => model.FirstName)
                                @Html.ValidationMessageFor(model => model.FirstName)
                            </div>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <div>
                                @Html.LabelFor(model => model.LastName, "نام خانوادگی")
                            </div>
                        </td>
                        <td>
                            <div>
                                @Html.EditorFor(model => model.LastName)
                                @Html.ValidationMessageFor(model => model.LastName)
                            </div>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <div>
                                @Html.LabelFor(model => model.NationalCode, "کد ملی")
                            </div>
                        </td>
                        <td>
                            <div>
                                @Html.EditorFor(model => model.NationalCode)
                                @Html.ValidationMessageFor(model => model.NationalCode)
                            </div>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <div>
                                @Html.LabelFor(model => model.Email, "ایمیل")
                            </div>
                        </td>
                        <td>
                            <div>
                                @Html.EditorFor(model => model.Email)
                                @Html.ValidationMessageFor(model => model.Email)
                            </div>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <div>
                                @Html.LabelFor(model => model.PhoneNo, "تلفن")
                            </div>
                        </td>
                        <td>
                            <div>
                                @Html.EditorFor(model => model.PhoneNo)
                                @Html.ValidationMessageFor(model => model.PhoneNo)
                            </div>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <div>
                                @Html.LabelFor(model => model.MobileNo, "موبایل")
                            </div>
                        </td>
                        <td>
                            <div>
                                @Html.EditorFor(model => model.MobileNo)
                                @Html.ValidationMessageFor(model => model.MobileNo)
                            </div>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <div>
                                @Html.LabelFor(model => model.Address, "آدرس")
                            </div>
                        </td>
                        <td>
                            <div>
                                @Html.TextAreaFor(model => model.Address, 5, 30, null)
                                @Html.ValidationMessageFor(model => model.Address)
                            </div>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            نقش‌ها </td>
                        <td>
                            @Helper.CheckBoxList("Roles", (List<SelectListItem>)ViewBag.Roles)
                        </td>
                    </tr>
                    <tr>
                        <td>
                        </td>
                        <td>
                            <input type="submit" value="ذخیره" class="btn btn-primary" />
                        </td>
                    </tr>
                </table>
            </div>
        </fieldset>
    
    }

select '0.4400' as Expected , cast(0.4400 as decimal) as Actual
select '1.3200' as Expected, cast(1.3200 as decimal) as Actual
select '1.7600' as Expected, cast(1.7600 as decimal) as Actual
select '65.0000' as Expected, cast(65.0000 as decimal) as Actual
select '99.50' as Expected, cast(99.50 as decimal) as Actual

 select iif(cast(0.1 + 0.2 as decimal) = 0, 'true', 'false')

modelBuilder.Properties<decimal>().Configure(x => x.HasPrecision(18, 6));

No store type was specified for the decimal property 'Price' on entity type 'Product'.
This will cause values to be silently truncated if they do not fit in the default precision and scale.
Explicitly specify the SQL server column type that can accommodate all the values in 'OnModelCreating'
using 'HasColumnType', specify precision and scale using 'HasPrecision',
or configure a value converter using 'HasConversion'.

protected override void ConfigureConventions(ModelConfigurationBuilder configurationBuilder)
{
    configurationBuilder.Properties<decimal>().HavePrecision(18, 6);
}

public class BaseEntity
{
   public int Id { set; get; }
   public DateTime? DateAdded { set; get; }
   public DateTime? DateUpdated { set; get; }
}

public class Person : BaseEntity
{
   public string FirstName { get; set; }
   public string LastName { get; set; }
}

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Ignore<BaseEntity>();

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
   modelBuilder.Ignore<BaseEntity>();
   foreach (var entityType in modelBuilder.Model.GetEntityTypes())
   {
     var dateAddedProperty = entityType.FindProperty("DateAdded");
     dateAddedProperty.ValueGenerated = ValueGenerated.OnAdd;
     dateAddedProperty.SqlServer().DefaultValueSql = "getdate()";
     var dateUpdatedProperty = entityType.FindProperty("DateUpdated");
     dateUpdatedProperty.ValueGenerated = ValueGenerated.OnAddOrUpdate;
     dateUpdatedProperty.SqlServer().ComputedColumnSql = "getdate()";
   }

public class Blog
{
   public int BlogId { get; set; }
   public string Url { get; set; }
}

public class RssBlog : Blog
{
   public string RssUrl { get; set; }
}

class MyContext : DbContext
{
   public DbSet<Blog> Blogs { get; set; }
   protected override void OnModelCreating(ModelBuilder modelBuilder)
   {
      modelBuilder.Entity<Blog>()
       .HasDiscriminator<string>("blog_type")
       .HasValue<Blog>("blog_base")
       .HasValue<RssBlog>("blog_rss");
   }
}

 var blog1 = db.Blogs.OfType<RssBlog>().FirstOrDefault(x => x.RssUrl == "………");