• Conditional INSERT/UPDATE Race Condition
• “UPSERT” Race Condition With MERGE
• آسیب‌پذیری Race Condition در آکادمی لیان
• Race Condition in Web Application
• Processing Data Queues in SQL Server with READPAST and UPDLOCK
• PostgreSQL anti-patterns: read-modify-write cycles
• PHP Race Condition Vulnerability Example
• Application Locks (or Mutexes) in SQL Server 2005
• Handle Race Conditions / Concurrency in Code First Entity Framework Applications

Entity Framework supports three ways to load related data - eager loading, lazy loading and explicit loading. The techniques shown in this topic apply equally to models created with Code First and the EF Designer. 

  The "Blazor United" effort is really a collection of features we're adding to Blazor so that you can get the best of server & client based web development. These features include: Server-side rendering, streaming rendering, enhanced navigations & form handling, add client interactivity per page or component, and determining the client render mode at runtime. We've started delivering server-side rendering support for Blazor with .NET 8 Preview 3, which is now available to try out. We plan to deliver the remaining features in upcoming previews. We hope to deliver them all for .NET 8, but we'll see how far we get. 

This is the first release of a 64-bit Visual Studio and we’d love for you to download it, try it out, and join us in shaping the next major release of Visual Studio with your feedback. 

ExtCore allows you to decouple your application into the modules (or extensions) and reuse that modules in other applications in various combinations. Each ExtCore extension may consist of one or more projects and each project may include everything you want (as any other ASP.NET Core project). Controllers, view components, views (added as resources and/or precompiled), static content (added as resources) will be resolved automatically. These projects (extension pieces) may be added to the application directly as dependencies in project.json of your main application project (as source code or NuGet packages), or by copying compiled DLL-files to the Extensions folder. ExtCore supports both of these approaches out of the box and at the same time. 

SqlCommand cmd=new SqlCommand ("select count(*) from login where user='"+userName+"' and pass='"+password+"'",con);

select count(*) from login where user='admin' and pass='salam123'

' or 1=1 --

select count(*) from login where user='admin' and pass='' or 1=1 --'

SqlCommand cmd=new SqlCommand ("select count(*) from login where user=@u and pass=@p",con);

cmd.Parameters.Add("@u", SqlDbType.Varchar, 10).Value=TextLogin.Text.Trim();

cmd.Parameters.Add("@p", SqlDbType.Varchar,10).Value=TextPwd.Text.Trim();

Ready to get started with Visual Studio 2017? This is your course! Join the experts and get the details, from installation to debugging, in this practical Visual Studio 2017 deep dive.

See how to download and install Visual Studio in standalone and networked environments, along with some of the configuration options, such as choosing your workloads (types of apps or services, languages, and platforms), customizing the installation, and installing language packs. Then, take a tour of the Visual Studio IDE, including all the basics you need to get started with your development projects. Finally, explore debugging in Visual Studio, and learn how to use its features to investigate problems in your code.

پیش زمینه: سیستم عضویت در ASP.NET

[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Register(RegisterViewModel model)
{
    if (ModelState.IsValid)
    {
        var user = new ApplicationUser() { UserName = model.UserName };
        var result = await UserManager.CreateAsync(user, model.Password);
        if (result.Succeeded)
        {
            await SignInAsync(user, isPersistent: false);
            return RedirectToAction("Index", "Home");
        }
        else
        {
            AddErrors(result);
        }
    }

    // If we got this far, something failed, redisplay form
    return View(model);
}

[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Register(RegisterViewModel model)
{
    if (ModelState.IsValid)
    {
        var user = new ApplicationUser() { UserName = model.UserName };
        var result = await UserManager.CreateAsync(user, model.Password);
        if (result.Succeeded)
        {
            await SignInAsync(user, isPersistent: false);
            return RedirectToAction("Index", "Home");
        }
        else
        {
            AddErrors(result);
        }
    }

    // If we got this far, something failed, redisplay form
    return View(model);
}

private async Task SignInAsync(ApplicationUser user, bool isPersistent)
{
    AuthenticationManager.SignOut(DefaultAuthenticationTypes.ExternalCookie);

    var identity = await UserManager.CreateIdentityAsync(
       user, DefaultAuthenticationTypes.ApplicationCookie);

    AuthenticationManager.SignIn(
       new AuthenticationProperties() { 
          IsPersistent = isPersistent 
       }, identity);
}

// POST: /Account/LogOff
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult LogOff()
{
    AuthenticationManager.SignOut();
    return RedirectToAction("Index", "Home");
}

Dive in and learn how to start building intelligence into your solutions with the Microsoft AI platform, including pre-trained AI services like Cognitive Services and Bot Framework, as well as deep learning tools like Azure Machine Learning, Visual Studio Code Tools for AI, and Cognitive Toolkit. Our platform enables any developer to code in any language and infuse AI into your apps. Whether your solutions are existing or new, this is the intelligence platform to build on.