public class UserAccountManager  : IUserAccountManager 
{
     private I,serRepository _userRepository ; 
     // تزریق درون سازنده
}

public class UserFinancialManager  : IUserFinancialManager  
{
     private IUserRepository _userRepository ; 
     // تزریق درون سازنده
}


public class UserController 
{
     IUserFinancialManager  _userFinancialManager ;
     IUserAccountManager  _userAccountManager;

     // تزریق درون سازنده
}

using System;

namespace AspNetCoreDependencyInjection.Services
{
    public interface IUserRepository
    {
        public string GID { get; }
    }

    public class UserRepository : IUserRepository
    {
        public string GID { get; private set; }

        public UserRepository()
        {
            GID = Guid.NewGuid().GetHashCode().ToString("x");
        }
    }

    //---------------------------------------------

    public interface IUserAccountManager
    {
        public string DisplayGuid();
    }

    public class UserAccountManager : IUserAccountManager
    {
        private IUserRepository _userRepository;

        public UserAccountManager(IUserRepository userRepository)
        {
            _userRepository = userRepository;
        }

        public string DisplayGuid()
        {
            return "UserFinancialManager Guid : " + _userRepository.GID;
        }
    }

    //-------------------------------------------------

    public interface IUserFinancialManager
    {
        public string DisplayGuid();
    }

    public class UserFinancialManager : IUserFinancialManager
    {
        private IUserRepository _userRepository;

        public UserFinancialManager(IUserRepository userRepository)
        {
            _userRepository = userRepository;
        }

        public string DisplayGuid()
        {
            return "UserFinancialManager Guid : " + _userRepository.GID;
        }
    }
}

public class UserController : Controller
    {
       
        private readonly IUserFinancialManager _userFinancialManager;

        private readonly IUserAccountManager _userAccountManager;

        public UserController(IUserFinancialManager userFinancialManager,
            IUserAccountManager userAccountManager)
        {
            _userFinancialManager = userFinancialManager;
            _userAccountManager = userAccountManager;
        }

        public IActionResult Index()
        {
            ViewBag.FinancialManager = _userFinancialManager.DisplayGuid();
            ViewBag.AccountManager = _userAccountManager.DisplayGuid();
            return View();
        }
    }

@{
ViewData["Title"] = "User";
}

<div class="text-center">
<div class="row">
<div class="col-12">
<p class="alert alert-info text-left">
<b>User Finanacial Manager / UserRepository Guid  : </b><span>@ViewBag.FinancialManager </span> <br />
<b>User Account Manager / UserRepository Guid  : </b><span>@ViewBag.AccountManager</span> <br />
</p>
</div>
</div>
</div>

 services.AddTransient<IUserRepository, UserRepository>();
 services.AddScoped<IUserAccountManager, UserAccountManager>();
services.AddScoped<IUserFinancialManager, UserFinancialManager>();


// اجرای دوم 
// services.AddScoped<IUserRepository, UserRepository>();
 //services.AddScoped<IUserAccountManager, UserAccountManager>();
//services.AddScoped<IUserFinancialManager, UserFinancialManager>();

<img id="logo" src="~/logo.png" />
/*CSS Isolation*/
::deep #logo {
    width: 100px;
}

<div b-ksdgitrxxw>
    <img id="log" src="~/logo.png" />
</div>

#logo[b-ksdgitrxxw] {
    width: 100px;
}

 var existingFeedStatistic = await this.repository.FeedStatistics
                .FirstOrDefaultAsync(f => f.Identifier == command.Identifier
                    && f.Application == command.Application
                    && f.Identifier != null
                    && f.Created >= currentDay
                    && f.Created < nextDay);

await this.repository.SaveChangesAsync();

Compiler Error Message: CS0103: The name 'workout' does not exist in the current context  
@using ActionImage.Extentions;
@Html.ActionImage("Workout", "Delete", new { id = @workout.Id }, "/images/bluetrash.png", "Delete", new { id="deletebutton"})