for (int i = 0; i < 2000; i++)
{
    Pupil pupil = GetNewPupil();
    db.Pupils.Add(pupil);
}
db.SaveChanges();

var list = new List<Pupil>();

for (int i = 0; i < 2000; i++)
{
    Pupil pupil = GetNewPupil();
    list.Add(pupil);
}

db.Pupils.AddRange(list);
db.SaveChanges();

db.Configuration.AutoDetectChangesEnabled = false;

string city = "New York";

List<School> schools = db.Schools
    .AsNoTracking()
    .Where(s => s.City == city)
    .Take(100)
    .ToList();

 public class CustomManifestTokenResolver : IManifestTokenResolver
{
    public string ResolveManifestToken(DbConnection connection)
    {
        return "2014";
    }
}

 public class CustomDbConfiguration : DbConfiguration
{
    public CustomDbConfiguration()
    {
        SetManifestTokenResolver(new CustomManifestTokenResolver());
    }
}

MultipleActiveResultSets=True;

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        // Web API configuration and services

        // Web API routes
        config.MapHttpAttributeRoutes();
    }
}

public class VideoStream
{
    private readonly string _filename;
    private long _contentLength;

    public long FileLength
    {
        get { return _contentLength; }
    }

    public VideoStream(string videoPath)
    {
        _filename = videoPath;
        using (var video = File.Open(_filename, FileMode.Open, FileAccess.Read, FileShare.Read))
        {
            _contentLength = video.Length;
        }
    }

    public async void WriteToStream(Stream outputStream,
        HttpContent content, TransportContext context)
    {
        try
        {
            var buffer = new byte[65536];

            using (var video = File.Open(_filename, FileMode.Open, FileAccess.Read, FileShare.Read))
            {
                var length = (int)video.Length;
                var bytesRead = 1;

                while (length > 0 && bytesRead > 0)
                {
                    bytesRead = video.Read(buffer, 0, Math.Min(length, buffer.Length));
                    await outputStream.WriteAsync(buffer, 0, bytesRead);
                    length -= bytesRead;
                }
            }
        }
        catch (HttpException)
        {
            return;
        }
        finally
        {
            outputStream.Close();
        }
    }
}

while (length > 0 && bytesRead > 0)
{
    bytesRead = video.Read(buffer, 0, Math.Min(length, buffer.Length));
    await outputStream.WriteAsync(buffer, 0, bytesRead);
    length -= bytesRead;
}

public class VideoController : ApiController
{
    [Route("api/video/{ext}/{fileName}")]
    public HttpResponseMessage Get(string ext, string fileName)
    {
        string videoPath = HostingEnvironment.MapPath(string.Format("~/Videos/{0}.{1}", fileName, ext));
        if (File.Exists(videoPath))
        {
            FileInfo fi = new FileInfo(videoPath);
            var video = new VideoStream(videoPath);

            var response = Request.CreateResponse();

            response.Content = new PushStreamContent((Action<Stream, HttpContent, TransportContext>)video.WriteToStream,
                new MediaTypeHeaderValue("video/" + ext));

            response.Content.Headers.Add("Content-Disposition", "attachment;filename=" + fi.Name.Replace(" ", ""));
            response.Content.Headers.Add("Content-Length", video.FileLength.ToString());

            return response;
        }
        else
        {
            return Request.CreateResponse(HttpStatusCode.NotFound);
        }
    }
}

[Route("api/video/{ext}/{fileName}")]

api/video/mp4/sample

string videoPath = HostingEnvironment.MapPath(string.Format("~/Videos/{0}.{1}", fileName, ext));

var video = new VideoStream(videoPath);

var response = Request.CreateResponse();

response.Content = new PushStreamContent((Action<Stream, HttpContent, TransportContext>)video.WriteToStream, new MediaTypeHeaderValue("video/" + ext));

response.Content.Headers.Add("Content-Disposition", "attachment;filename=" + fileName);
response.Content.Headers.Add("Content-Length", video.FileLength.ToString());

if(File.Exists(videoPath))
{
    // removed for bravity
}
else
{
    return Request.CreateResponse(HttpStatusCode.NotFound);
}

public class HomeController : Controller
{
    // GET: Home
    public ActionResult Index()
    {
        return View();
    }
}

<div>
    <div>
        <video width="480" height="270" controls="controls" preload="auto">
            <source src="/api/video/mp4/sample" type="video/mp4" />
            Your browser does not support the video tag.
        </video>
    </div>
</div>

{
    "dependencies": {
        "Microsoft.Extensions.Caching.SqlServer": "1.1.0"
    },
    "tools": {
        "Microsoft.Extensions.Caching.SqlConfig.Tools": "1.1.0-preview4-final"
    }
}

 dotnet sql-cache create "Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=sql_cache;Integrated Security=True;" "dbo" "AppSqlCache"

CREATE TABLE AppSqlCache (
    Id                         NVARCHAR (449)  COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL,
    Value                      VARBINARY (MAX) NOT NULL,
    ExpiresAtTime              DATETIMEOFFSET  NOT NULL,
    SlidingExpirationInSeconds BIGINT          NULL,
    AbsoluteExpiration         DATETIMEOFFSET  NULL,
    CONSTRAINT pk_Id PRIMARY KEY (Id)
);

CREATE NONCLUSTERED INDEX Index_ExpiresAtTime
    ON AppSqlCache(ExpiresAtTime);

    public class AppSqlCache
    {
        public string Id { get; set; }
        public byte[] Value { get; set; }
        public DateTimeOffset ExpiresAtTime { get; set; }
        public long? SlidingExpirationInSeconds { get; set; }
        public DateTimeOffset? AbsoluteExpiration { get; set; }
    }

    public class MyDBDataContext : DbContext
    {
        public virtual DbSet<AppSqlCache> AppSqlCache { get; set; }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.Entity<AppSqlCache>(entity =>
            {
                entity.ToTable(name: "AppSqlCache", schema: "dbo");
                entity.HasIndex(e => e.ExpiresAtTime).HasName("Index_ExpiresAtTime");
                entity.Property(e => e.Id).HasMaxLength(449);
                entity.Property(e => e.Value).IsRequired();
            });
        }
    }

public void ConfigureServices(IServiceCollection services)
{
    services.AddDistributedSqlServerCache(options =>
    {
        options.ConnectionString = @"Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=sql_cache;Integrated Security=True;";
        options.SchemaName = "dbo";
        options.TableName = "AppSqlCache";
    });

public IActionResult Index()
{
   HttpContext.Session.SetString("User", "VahidN");
   return Json(true);
}

public IActionResult About()
{
   var userContent = HttpContext.Session.GetString("User");
   return Json(userContent);
}

 services.Add(ServiceDescriptor.Singleton<IDistributedCache, SqlServerCache>());

using System;
using System.Text;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Caching.Distributed;
 
namespace Core1RtmEmptyTest.Controllers
{
    public class CacheTestController : Controller
    {
        readonly IDistributedCache _cache;
        public CacheTestController(IDistributedCache cache)
        {
            _cache = cache;
        }
 
        public IActionResult SetCacheData()
        {
            var time = DateTime.Now.ToLocalTime().ToString();
            var cacheOptions = new DistributedCacheEntryOptions
            {
                AbsoluteExpiration = DateTime.Now.AddYears(1)
 
            };
            _cache.Set("Time", Encoding.UTF8.GetBytes(time), cacheOptions);
            return View();
        }
 
        public IActionResult GetCacheData()
        {
            var time = Encoding.UTF8.GetString(_cache.Get("Time"));
            ViewBag.data = time;
            return View();
        }
 
        public bool RemoveCacheData()
        {
            _cache.Remove("Time");
            return true;
        }
    }
}

  Value  VARBINARY (MAX) NOT NULL,

  public byte[] Value { get; set; }

<distributed-cache name="MyCacheItem2" expires-sliding="TimeSpan.FromMinutes(30)">
    <p>From distributed-cache</p>
    @DateTime.Now.ToString()
</distributed-cache>

public class NestedClass
{
    private int _field2;
    public NestedClass()
    {
        _field2 = 12;
    }
}
 
public class MyClass
{
    private int _field1;
    private NestedClass _nestedClass;
 
    public MyClass()
    {
        _field1 = 1;
        _nestedClass = new NestedClass();
    }
 
    private string GetData()
    {
        return "Test";
    }
}

var myClass = new MyClass();
 
var field1Obj = myClass.GetType().GetField("_field1", BindingFlags.NonPublic | BindingFlags.Instance);
if (field1Obj != null)
{
    Console.WriteLine(Convert.ToInt32(field1Obj.GetValue(myClass)));
}

var getDataMethod = myClass.GetType().GetMethod("GetData", BindingFlags.NonPublic | BindingFlags.Instance);
if (getDataMethod != null)
{
    Console.WriteLine(getDataMethod.Invoke(myClass, null));
}

var nestedClassObj = myClass.GetType().GetField("_nestedClass", BindingFlags.NonPublic | BindingFlags.Instance);
if (nestedClassObj != null)
{
    var nestedClassFieldValue = nestedClassObj.GetValue(myClass);
    var field2Obj = nestedClassFieldValue.GetType()
        .GetField("_field2", BindingFlags.NonPublic | BindingFlags.Instance);
    if (field2Obj != null)
    {
        Console.WriteLine(Convert.ToInt32(field2Obj.GetValue(nestedClassFieldValue)));
    }
}

myClass._field1
myClass._nestedClass._field2
myClass.GetData()

 // Accessing a private field
dynamic myClassProxy = new DynamicProxy(myClass);
dynamic field1 = myClassProxy._field1;
Console.WriteLine((int)field1);
 
// Accessing a nested private field
dynamic field2 = myClassProxy._nestedClass._field2;
Console.WriteLine((int)field2);
 
// Accessing a private method
dynamic data = myClassProxy.GetData();
Console.WriteLine((string)data);

function printId(id: number | string) {
  console.log("Your ID is: " + id);
}

 CREATE TABLE [Geo](
[id] [int] IDENTITY(1,1) NOT NULL,
[Location] [geography] NULL
)

 insert into Geo( Location , long, lat ) values
( geography::STGeomFromText ('POINT(-121.527200 45.712113)', 4326))

using System.Data.Entity.Spatial;

namespace EFGeoTests.Models
{
    public class GeoLocation
    {
        public int Id { get; set; }
        public DbGeography Location { get; set; }
        public string Name { get; set; }
        public string Type { get; set; }

        public override string ToString()
        {
            return string.Format("Name:{0}, Location:{1}", Name, Location);
        }
    }
}

using System;
using System.Data.Entity;
using EFGeoTests.Models;

namespace EFGeoTests.Config
{
    public class MyContext : DbContext
    {
        public DbSet<GeoLocation> GeoLocations { get; set; }

        public MyContext()
            : base("Connection1")
        {
            this.Database.Log = sql => Console.Write(sql);
        }
    }
}

   private static DbGeography createPoint(double longitude, double latitude,  int coordinateSystemId = 4326)
  {
       var text = string.Format(CultureInfo.InvariantCulture.NumberFormat,"POINT({0} {1})", longitude, latitude);
       return DbGeography.PointFromText(text, coordinateSystemId);
  }

GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]

        /// <summary>
        /// Gets the current shape in the collection
        /// </summary>
        public Shape Current
        {
            get 
            {
                if (_disposed) throw new ObjectDisposedException("Shapefile");
                if (!_opened) throw new InvalidOperationException("Shapefile not open.");
               
                // get the metadata
                StringDictionary metadata = null;
                if (!RawMetadataOnly)
                {
                    metadata = new StringDictionary();
                    for (int i = 0; i < _dbReader.FieldCount; i++)
                    {
                        string value = _dbReader.GetValue(i).ToString();
                        if (_dbReader.GetDataTypeName(i) == "DBTYPE_WVARCHAR")
                        {
                            // برای نمایش متون فارسی نیاز است
                            value = Encoding.UTF8.GetString(Encoding.GetEncoding(720).GetBytes(value));
                        }
                        metadata.Add(_dbReader.GetName(i),
                            value);
                    }
                }

using System.Collections.Generic;
using System.Linq;
using Catfood.Shapefile;

namespace EFGeoTests
{
    public class MapPoint
    {
        public Dictionary<string, string> Metadata { set; get; }
        public double X { set; get; }
        public double Y { set; get; }
    }

    public static class ShapeReader
    {
        public static IList<MapPoint> ReadShapeFile(string path)
        {
            var results = new List<MapPoint>();

            using (var shapefile = new Shapefile(path))
            {
                foreach (var shape in shapefile)
                {
                    if (shape.Type != ShapeType.Point)
                        continue;

                    var shapePoint = shape as ShapePoint;
                    if (shapePoint == null)
                        continue;


                     var metadataNames = shape.GetMetadataNames();
                    if(!metadataNames.Any())
                        continue;

                    var metadata = new Dictionary<string, string>();
                    foreach (var metadataName in metadataNames)
                    {
                        metadata.Add(metadataName,shape.GetMetadata(metadataName));
                    }

                    results.Add(new MapPoint
                    {
                        Metadata = metadata,
                        X = shapePoint.Point.X,
                        Y = shapePoint.Point.Y
                    });
                }
            }

            return results;
        }
    }
}

            var points = ShapeReader.ReadShapeFile("IranShapeFiles\\places.shp");
            using (var context = new MyContext())
            {
                context.Configuration.AutoDetectChangesEnabled = false;
                context.Configuration.ProxyCreationEnabled = false;
                context.Configuration.ValidateOnSaveEnabled = false;

                if (context.GeoLocations.Any())
                    return;

                foreach (var point in points)
                {
                    context.GeoLocations.Add(new GeoLocation
                    {
                        Name = point.Metadata["name"],
                        Type = point.Metadata["type"],
                        Location = createPoint(point.X, point.Y)
                    });
                }

                context.SaveChanges();
            }

            var tehran = createPoint(51.4179604, 35.6884243);

            using (var context = new MyContext())
            {
                // find any locations within 5 kilometers ordered by distance
                var locations = context.GeoLocations
                    .Where(loc => loc.Location.Distance(tehran) < 5000)
                    .OrderBy(loc => loc.Location.Distance(tehran))
                    .ToList();

                foreach (var location in locations)
                {
                    Console.WriteLine(location.Name);
                }
            }

            var tehran = createPoint(51.4179604, 35.6884243);
            using (var context = new MyContext())
            {
                // find any locations within 5 kilometers ordered by distance
                var tehranLocation = context.GeoLocations.FirstOrDefault(loc => loc.Location.SpatialEquals(tehran));
                if (tehranLocation != null)
                {
                    Console.WriteLine(tehranLocation.Type);
                }
            }

namespace OpenAPISwaggerDoc.Web.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class ConventionTestsController : ControllerBase
    {
        // GET: api/ConventionTests/5
        [HttpGet("{id}", Name = "Get")]
        [ApiConventionMethod(typeof(DefaultApiConventions), nameof(DefaultApiConventions.Get))]
        public string Get(int id)
        {
            return "value";
        }

using Microsoft.AspNetCore.Mvc.ApiExplorer;

namespace Microsoft.AspNetCore.Mvc
{
    public static class DefaultApiConventions
    {
        [ApiConventionNameMatch(ApiConventionNameMatchBehavior.Prefix)]
        [ProducesDefaultResponseType]
        [ProducesResponseType(200)]
        [ProducesResponseType(404)]
        public static void Get(
[ApiConventionNameMatch(ApiConventionNameMatchBehavior.Suffix)]
[ApiConventionTypeMatch(ApiConventionTypeMatchBehavior.Any)] 
object id);
    }
}

namespace OpenAPISwaggerDoc.Web.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    [ApiConventionType(typeof(DefaultApiConventions))]
    public class ConventionTestsController : ControllerBase

[assembly: ApiConventionType(typeof(DefaultApiConventions))]
namespace OpenAPISwaggerDoc.Web
{
    public class Startup

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.ApiExplorer;

namespace OpenAPISwaggerDoc.Web.AppConventions
{
    public static class CustomConventions
    {
        [ProducesDefaultResponseType]
        [ProducesResponseType(StatusCodes.Status201Created)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [ApiConventionNameMatch(ApiConventionNameMatchBehavior.Prefix)]
        public static void Insert(
            [ApiConventionNameMatch(ApiConventionNameMatchBehavior.Any)]
            [ApiConventionTypeMatch(ApiConventionTypeMatchBehavior.Any)]
            object model)
        { }
    }
}

namespace OpenAPISwaggerDoc.Web.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class ConventionTestsController : ControllerBase
    {
        [HttpPost]
        [ApiConventionMethod(typeof(CustomConventions), nameof(CustomConventions.Insert))]
        public void Insert([FromBody] string value)
        {
        }

namespace OpenAPISwaggerDoc.Web.Controllers
{
    [Produces("application/json")]
    [Route("api/authors/{authorId}/books")]
    [ApiController]
    public class BooksController : ControllerBase

namespace OpenAPISwaggerDoc.Web
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc(setupAction =>
            {
                setupAction.OutputFormatters.Add(new XmlSerializerOutputFormatter());

namespace OpenAPISwaggerDoc.Web.Controllers
{
    [Produces("application/json", "application/xml")]
    [Route("api/authors/{authorId}/books")]
    [ApiController]
    public class BooksController : ControllerBase

namespace OpenAPISwaggerDoc.Web
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc(setupAction =>
            {
                setupAction.ReturnHttpNotAcceptable = true; // Status406NotAcceptable

namespace OpenAPISwaggerDoc.Web.Controllers
{
    [Produces("application/json", "application/xml")]
    [Route("api/authors/{authorId}/books")]
    [ApiController]
    public class BooksController : ControllerBase
    {
        /// <summary>
        /// Create a book for a specific author
        /// </summary>
        /// <param name="authorId">The id of the book author</param>
        /// <param name="bookForCreation">The book to create</param>
        /// <returns>An ActionResult of type Book</returns>
        [HttpPost()]
        [Consumes("application/json")]
        [ProducesResponseType(StatusCodes.Status201Created)]
        [ProducesResponseType(StatusCodes.Status404NotFound)]
        public async Task<ActionResult<Book>> CreateBook(
            Guid authorId,
            [FromBody] BookForCreation bookForCreation)
        {

> create-react-app sample-15
> cd sample-15
> npm start

> npm install --save bootstrap

import "bootstrap/dist/css/bootstrap.css";

> npm i react-router-dom --save

import { BrowserRouter } from "react-router-dom";

ReactDOM.render(
  <BrowserRouter>
    <App />
  </BrowserRouter>,
  document.getElementById("root")
);

import React from "react";

const NavBar = () => {
  return (
    <nav className="navbar bg-dark navbar-dark navbar-expand-sm">
      <div className="navbar-nav">
        <a className="nav-item nav-link" href="/">
          Home
        </a>
        <a className="nav-item nav-link" href="/products">
          Products
        </a>
        <a className="nav-item nav-link" href="/posts/2018/06">
          Posts
        </a>
        <a className="nav-item nav-link" href="/admin">
          Admin
        </a>
      </div>
    </nav>
  );
};

export default NavBar;

import "./App.css";

import React, { Component } from "react";

import NavBar from "./components/navbar";

class App extends Component {
  render() {
    return (
      <div>
        <NavBar />
      </div>
    );
  }
}

export default App;

import "./App.css";

import React, { Component } from "react";
import { Route } from "react-router-dom";

import Dashboard from "./components/admin/dashboard";
import Home from "./components/home";
import NavBar from "./components/navbar";
import Posts from "./components/posts";
import Products from "./components/products";

class App extends Component {
  render() {
    return (
      <div>
        <NavBar />
        <div className="container">
          <Route path="/products" component={Products} />
          <Route path="/posts" component={Posts} />
          <Route path="/admin" component={Dashboard} />
          <Route path="/" component={Home} />
        </div>
      </div>
    );
  }
}

export default App;

import React from "react";

const Home = () => {
  return <h1>Home</h1>;
};

export default Home;

import React from "react";

const Posts = () => {
  return (
    <div>
      <h1>Posts</h1>
      Year: , Month:
    </div>
  );
};

export default Posts;

import React from "react";

const Dashboard = ({ match }) => {
  return (
    <div>
      <h1>Admin Dashboard</h1>
    </div>
  );
};

export default Dashboard;

<div className="container">
  <Route path="/products" component={Products} />
  <Route path="/posts" component={Posts} />
  <Route path="/admin" component={Dashboard} />
  <Route path="/" component={Home} />
</div>

<Route path="/" exact component={Home} />

import { Route, Switch } from "react-router-dom";

class App extends Component {
  render() {
    return (
      <div>
        <NavBar />
        <div className="container">
          <Switch>
            <Route path="/products" component={Products} />
            <Route path="/posts" component={Posts} />
            <Route path="/admin" component={Dashboard} />
            <Route path="/"  component={Home} />
          </Switch>
        </div>
      </div>
    );
  }
}

import React from "react";
import { Link } from "react-router-dom";

const NavBar = () => {
  return (
    <nav className="navbar bg-dark navbar-dark navbar-expand-sm">
      <div className="navbar-nav">
        <Link className="nav-item nav-link" to="/">
          Home
        </Link>
        <Link className="nav-item nav-link" to="/products">
          Products
        </Link>
        <Link className="nav-item nav-link" to="/posts/2018/06">
          Posts
        </Link>
        <Link className="nav-item nav-link" to="/admin">
          Admin
        </Link>
      </div>
    </nav>
  );
};

export default NavBar;

<Route
  path="/products"
  render={() => <Products param1="123" param2="456" />}
/>

<Route
  path="/products"
  render={props => (
    <Products param1="123" param2="456" {...props} />
  )}
/>