using System.IO;
using System.Text;

class Program
{
  static void Main()
  {
    using (var writer = new StreamWriter("data.txt"))
    {
      var builder = new StringBuilder();
      for (var i = 0; i <= 256; i++)
      {
        writer.Write(builder.Capacity);
        writer.Write(",");
        writer.Write(builder.Length);
        writer.WriteLine();
        builder.Append('1'); // <-- Add one character
      }
    }
  }
}

16, 0
16, 1
16, 2
...
16,14
16,15
16,16
32,17
...

namespace StringBuilderTest
{
  internal class SbTest1
  {
    internal Action<string> WriteLog;
    internal int Iterations { get; set; }
    internal string TestString { get; set; }

    internal SbTest1(int iterations, string testString, Action<string> writeLog)
    {
      Iterations = iterations;
      TestString = testString;
      WriteLog = writeLog;
    }

    internal void StartTest()
    {
      var watch = new Stopwatch();

      //StringBuilder
      watch.Start();
      var sbTestResult = SbTest();
      watch.Stop();
      WriteLog(string.Format("StringBuilder time: {0}", watch.ElapsedMilliseconds));

      //Concat
      watch.Start();
      var concatTestResult = ConcatTest();
      watch.Stop();
      WriteLog(string.Format("ConcatTest time: {0}", watch.ElapsedMilliseconds));

      WriteLog(string.Format("Results are{0} the same", sbTestResult == concatTestResult ? string.Empty : " NOT"));
    }

    private string SbTest()
    {
      var sb = new StringBuilder(TestString);
      for (var x = 0; x < Iterations; x++)
      {
        sb.Append(TestString);
      }
      return sb.ToString();
    }

    private string ConcatTest()
    {
      string concat = TestString;
      for (var x = 0; x < Iterations; x++)
      {
        concat += TestString;
      }
      return concat;
    }
  }
}

do
{
  Console.Write("Iteration: ");
  var iterations = Convert.ToInt32(Console.ReadLine());
  Console.Write("Test String: ");
  var testString = Console.ReadLine();
  var test1 = new SbTest1(iterations, testString, Console.WriteLine);
  test1.StartTest();
  Console.WriteLine("----------------------------------------------------------------");
} while (Console.ReadKey(true).Key == ConsoleKey.C); // C = continue 

private string SbCapacityTest()
{
  var sb = new StringBuilder(TestString) { Capacity = TestString.Length * Iterations };
  for (var x = 0; x < Iterations; x++)
  {
    sb.Append(TestString);
  }
  return sb.ToString();
}

namespace Nop.Services
{
    public interface ICustomService
    {
        protected InjectType Inject { get;  }
        protected int Order { get; }
        protected ImplementationType implementationType { get; }
    }
    public enum ImplementationType
    {
        WithInterface = 0,
        WithoutInterface = 1
    }
    public enum InjectType
    {
        Scopped=0,
        Transit=1,
        SingleTon=2
    }
}

namespace Nop.Services
{
    public interface IMyCustomService: ICustomService
    {
        int ok();
    }
}

namespace Nop.Services
{
    public class MyCustomService : IMyCustomService
    {
        public InjectType Inject { get;  }
        public int Order { get;  }
        public ImplementationType implementationType { get;  }

        public MyCustomService()
        {
            implementationType = ImplementationType.WithInterface;
            Inject = InjectType.Scopped;
            Order = 1;
        }
        public int ok()
        {
            return 10;
        }
    }
}

namespace Nop.Web.Framework.Infrastructure
{
    public class CustomDependencyInjection : NopStartup
    {
        private static bool IsSubInterface(Type t1, Type t2)
        {
            if (!t2.IsAssignableFrom(t1))
                return false;

            if (t1.BaseType == null)
                return true;

            return !t2.IsAssignableFrom(t1.BaseType);
        }
        public override void ConfigureServices(IServiceCollection services, IConfiguration configuration)
        {
            //-------------Get All Services-------------
            var asm = AppDomain.CurrentDomain
                 .GetAssemblies()
                 .Single(x => x.FullName.Contains("Nop.Services"));
            //-------------find Services that inheriance of ICustomService-------------
            var types = asm.DefinedTypes.Where(x => IsSubInterface(x, typeof(ICustomService)));
            //-----------Get All Custom Service Classess-------
            var allRelatedClassServices = types
                .Where(x => x.IsClass)
                .OrderBy(x=>(Int32)x.GetProperty("Order")
                .GetValue(Activator.CreateInstance(x), null));

            //-----------Get All Custom Service Interfaces-------
            var allRelatedInterfaceServices = types.Where(x => x.IsInterface);
            //-----------Matche Class Services To Related Interface Services-------
            TypeInfo interfaceService=null;
            foreach (var classService in allRelatedClassServices)
            {
                //-----------detect Implementation Type for service-----------
                var implementationValue = (ImplementationType)classService.GetProperty("implementationType")
                   .GetValue(Activator.CreateInstance(classService), null);

                //-----------detect inject type for service-----------
                var InjectValue = (InjectType)classService.GetProperty("Inject")
                   .GetValue(Activator.CreateInstance(classService), null);

                //-----------get related interface for service class-----------
                if (implementationValue == ImplementationType.WithInterface)
                    interfaceService = allRelatedInterfaceServices.Single(x => x.Name == $"I{classService.Name}");

               

                //----------finally Add Custom Service To Service Collection-----------
                switch (InjectValue)
                {
                    case InjectType.Scopped:
                        if(interfaceService!=null)
                            services.AddScoped(interfaceService, classService);
                        else
                            services.AddScoped(classService);
                        break;
                    case InjectType.Transit:
                        if (interfaceService != null)
                            services.AddTransient(interfaceService, classService);
                        else
                            services.AddTransient(classService);
                        break;
                    case InjectType.SingleTon:
                        if (interfaceService != null)
                            services.AddSingleton(interfaceService, classService);
                        else
                            services.AddSingleton(classService);
                        break;
                    default:
                        break;
                }
                interfaceService = null;
            }
        }
       
    }
}

• OpenCVSharp #1
• OpenCVSharp #2
• OpenCVSharp #3
• OpenCVSharp #4
• OpenCVSharp #5
• OpenCVSharp #6
• OpenCVSharp #7
• OpenCVSharp #8
• OpenCVSharp #9
• OpenCVSharp #10
• OpenCVSharp #11
• OpenCVSharp #12
• OpenCVSharp #13
• OpenCVSharp #14
• OpenCVSharp #15
• OpenCVSharp #16
• OpenCVSharp #17
• OpenCVSharp #18

using AufacDI.DomainClasses;
using AufacDI.ViewModel;
using AutoMapper;

namespace AufacDI.MapperProfile
{
    public class CategoryProfile : Profile
    {
        public CategoryProfile()
        {
            CreateMap<Category, CategoryViewModel>();
            CreateMap<CategoryViewModel, Category>();
        }
    }
}

using AufacDI.MapperProfile;
using Autofac;
using AutoMapper;
using System;
using System.Linq;

namespace AufacDI.IocConfig
{
    public static class IoCContainer
    {
       public static void Register(ContainerBuilder builder)
        {
            // شناسایی پروفایل‌ها براساس نمونه از کلاس پر.وفایل 
            var profiles = from types in typeof(CategoryProfile).Assembly.GetTypes()
                           where typeof(Profile).IsAssignableFrom(types)
                           select (Profile)Activator.CreateInstance(types);

            // رجیستر کردن کلاس‌های پروفایل در اتومپر
            builder.Register(ctx => new MapperConfiguration(cfg =>
            {
                foreach (var profile in profiles)
                    cfg.AddProfile(profile);
            })).SingleInstance().AutoActivate().AsSelf();

            // رجیستر کردن کلاس  MapperConfiguration و ایجاد آن براساس IMapper
            builder.Register(ctx => ctx.Resolve<MapperConfiguration>().CreateMapper()).As<IMapper>().InstancePerRequest();
        }
    }
}

var x;
var n = 12;
var obj = {};
var fn = function () { };
var a = new Array();

alert(typeof x);        // "undefined"
alert(typeof n);        // "number"
alert(typeof obj);     // "object"
alert(typeof fn);       // "function"
alert(typeof a);        // "object"

result = variable instanceof constructor

var a = new Array();
alert(a instanceof Array); // true
alert(a instanceof Object);   // true
alert(a instanceof Date); // false

var person = {
    name: "Meysam",
    age: 33,
    sayInfo: function () {
        alert(name + ":" + age);
    }
};

for (var i in person) 
    alert(i + " => " + person[i]);

     name => Meysam

    age => 33

    sayInfo => function() {
        alert(name + ":" + age);
    }

alert("name" in person); // true
alert("sayInfo" in person); // true
alert("birth" in person); // false

var person = {
    name: "Meysam",
    age: 33,
    sayInfo: function () {
        alert(name + ":" + age);
    }
};

alert("sayInfo" in person); // true
delete person.sayInfo;
alert("sayInfo" in person); // false

var obj = {};
var a = new Array();
var x = 10;

alert(obj.constructor);
alert(obj.constructor === Object);
alert(typeof obj.constructor);
alert(a.constructor);
alert(x.constructor);

    function Object() { [native code] }
    true
    function
    function Array() { [native code] }
    function Number() { [native code] }

public class Permission : InfiniteEnum<Permission>
{
    public static readonly Flag<Permission> None = new(-1);
    public static readonly Flag<Permission> ViewRoles = new(0);
    public static readonly Flag<Permission> ManageRoles = new(1);
    public static readonly Flag<Permission> ViewUsers = new(2);
    public static readonly Flag<Permission> ManageUsers = new(3);
    public static readonly Flag<Permission> ConfigureAccessControl = new(4);
    public static readonly Flag<Permission> Counter = new(5);
    public static readonly Flag<Permission> Forecast = new(6);
    public static readonly Flag<Permission> ViewAccessControl = new(7);

    // We can support up to 2,147,483,647 items

}

 git clone --recurse-submodules https://github.com/alirezanet/InfiniteEnumFlags.git

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

    public class PersonWithCtor
    {
        public PersonWithCtor(string firstName)
        {
            this.FirstName = firstName;
        }

        public string FirstName { get; set; }
    }

Person person = new Person();

var person = new Person();

Person person = new();

Person person = new("User 1");

var personList = new List<Person>
        {
            new ("User 1"),
            new ("User 2"),
            // ...
        };

public void Adopt(Person p)
{
    //...
}

public void CallerMethod()
{
    this.Adopt(new Person("User 1"));
    // C# 9.0
    this.Adopt(new("User 1"));
}

XmlReader.Create(reader, new XmlReaderSettings() { IgnoreWhitespace = true });
// C# 9.0
XmlReader.Create(reader, new() { IgnoreWhitespace = true });

Person person = new
{
   FirstName = "User 2"
};

Person person = new()
{
   FirstName = "User 2"
};

private ConcurrentDictionary<string, ObservableList<Cat>> _catsBefore = new ConcurrentDictionary<string, ObservableList<Cat>>();

private ConcurrentDictionary<string, ObservableList<Cat>> _cats = new(); // C# 9.0

public ObservableCollection<Friend> Friends { get; } = new();

public interface IAnimal
{
}

public class Dog : IAnimal
{
}

public class Cat : IAnimal
{
}

Cat cat = null;
Dog dog = new();
IAnimal animal = cat ?? dog;

(int a, int b) t = new(1, 2); // "new" is redundant

(int a, int b) t = new(); // OK; same as (0, 0)