A quick guide on how to properly instantiate and use HttpClient in .NET

Welcome to The Xamarin Show Snack Pack Edition. A Snack Pack is bite sized episode that is focused on a specific topic and covered in just a few minutes. Today, we take a look at how to manage and upgrade your Xamarin and Xamarin.Forms based applications to target .NET Standard. We also see how to install existing PCL based NuGets into that library. 

SQL is back. Not just because writing glue code to kludge together NoSQL tools is annoying. Not just because retraining workforces to learn a myriad of new languages is hard. Not just because standards can be a good thing.

But also because the world is filled with data. It surrounds us, binds us. At first, we relied on our human senses and sensory nervous systems to process it. Now our software and hardware systems are also getting smart enough to help us. And as we collect more and more data to make better sense of our world, the complexity of our systems to store, process, analyze, and visualize that data will only continue to grow as well. 

Today, we are launching .NET Live TV, your one stop shop for all .NET and Visual Studio live streams across Twitch and YouTube. We are always looking for new ways to bring great content to the developer community and innovate in ways to interact with you in real-time. Live streaming gives us the opportunity to deliver more content where everyone can ask questions and interact with the product teams. 

How To Capitalize The First Letter Of A String In JavaScript 

    public class IdentityErrorDescriber
    {
        public virtual IdentityError DefaultError()
        {
            return new IdentityError
            {
                Code = nameof(DefaultError),
                Description = Resources.DefaultError
            };
        }

    public class CustomIdentityErrorDescriber : IdentityErrorDescriber
    {
        public override IdentityError DefaultError()
        {
            return new IdentityError
            {
                Code = nameof(DefaultError),
                Description = "خطایی رخ داده‌است."
            };
        }

services.AddScoped<IdentityErrorDescriber, CustomIdentityErrorDescriber>();

services.AddIdentity<User, Role>(identityOptions =>
            {
            }).AddUserStore<ApplicationUserStore>()
               // the rest of the setting …
              .AddErrorDescriber<CustomIdentityErrorDescriber>()
               // the rest of the setting …

    public class PasswordValidator<TUser> : IPasswordValidator<TUser> where TUser : class
    {
        public PasswordValidator(IdentityErrorDescriber errors = null)
        {
            Describer = errors ?? new IdentityErrorDescriber();
        }

    public class CustomPasswordValidator : PasswordValidator<User>
    {
        private readonly IUsedPasswordsService _usedPasswordsService;
        private readonly ISet<string> _passwordsBanList;

        public CustomPasswordValidator(
            IdentityErrorDescriber errors,// How to use CustomIdentityErrorDescriber
            IOptionsSnapshot<SiteSettings> configurationRoot,
            IUsedPasswordsService usedPasswordsService) : base(errors)



    public class CustomUserValidator : UserValidator<User>
    {
        private readonly ISet<string> _emailsBanList;

        public CustomUserValidator(
            IdentityErrorDescriber errors,// How to use CustomIdentityErrorDescriber
            IOptionsSnapshot<SiteSettings> configurationRoot
            ) : base(errors)

• Overhauled memory management for vacuuming, resulting in significantly lower memory usage and running time. More on this here.
• Incremental backup support.
• Faster B-tree index scans.
• MERGE enhancements, including view support.
• New functions to extract elements from UUIDs.
• WAL improvements – up to 2x write throughput on some workloads.
• Improvements to SQL/JSON support, including JSON_TABLE.
• Bulk loading improvements and perf improvements for COPY which gains the ON_ERROR ignore option to ignore errors.
• Identity columns on partitioned tables.

How to create a .NET Core 3.0 trimmed self-contained single executable app using VS Code 

In June of 2020 we will stop allowing new domains to validate via ACMEv1.