public class LocalizationService
    {
        private readonly IStringLocalizer _localizer;
        public LocalizationService(IStringLocalizerFactory factory)
        {
            var type = typeof(Resource);
            var assemblyName = new AssemblyName(type.GetTypeInfo().Assembly.FullName!);
            _localizer = factory.Create("Resource", assemblyName.Name);
        }
        public LocalizedString GetLocalizedHtmlString(string key)
        {
            return _localizer[key];
        }
    }

 services.AddLocalization(options => options.ResourcesPath = "Resources");
 services.AddSingleton<LocalizationService>();

using Globalization.Resources;

 public void ConfigureServices(IServiceCollection services) { //localization & globalization  services.AddMvc().AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix); services.Configure<RequestLocalizationOptions>(options => { var supportedCultures = new[]{new CultureInfo("en-US"),new CultureInfo("ar-jo")}; options.DefaultRequestCulture = new RequestCulture(culture: "en-US", uiCulture: "en-US");options.SupportedCultures = supportedCultures;options.SupportedUICultures = supportedCultures;});}

using System.Globalization;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Localization;
using Microsoft.AspNetCore.Mvc.Razor;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Options;

 //localization & globalization
 var locOptions = app.ApplicationServices.GetService<IOptions<RequestLocalizationOptions>>();
 app.UseRequestLocalization(locOptions.Value);

@using Globalization
@using Globalization.Models
@using Globalization.Resources
@using Microsoft.AspNetCore.Builder
@using Microsoft.AspNetCore.Localization
@using Microsoft.Extensions.Options
@using Microsoft.AspNetCore.Mvc.Localization
@inject IViewLocalizer Localizer
@inject IOptions<RequestLocalizationOptions> LocOptions
@inject LocalizationService LocalizationService
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

@{
    ViewData["Title"] = "Home Page";
}
<div class="text-center">
    <h1 class="display-4">Welcome</h1>
</div>
@using Microsoft.AspNetCore.Builder
@using Microsoft.AspNetCore.Localization
@using Microsoft.Extensions.Options
@inject IOptions<RequestLocalizationOptions> LocOptions
@{
    var requestCulture = Context.Features.Get<IRequestCultureFeature>();
    var cultureItems = LocOptions.Value.SupportedUICultures
        .Select(c => new SelectListItem { Value = c.Name, Text = c.DisplayName })
        .ToList();
}
<form id="cultureForm" asp-action="Index">
    <label>Language:</label>
    <select onchange="SetCulture(this.value)" asp-for="@requestCulture.RequestCulture.UICulture.Name" asp-items="cultureItems">
    </select>
</form>
<table class="table culture-table">
    <tr>
        <td>@LocalizationService.GetLocalizedHtmlString("Culture") </td>
        <td>
            @requestCulture.RequestCulture.Culture.Name
        </td>
    </tr>
    <tr>
        <td>@LocalizationService.GetLocalizedHtmlString("UICulture")</td>
        <td>
            @requestCulture.RequestCulture.UICulture.Name
        </td>
    </tr>
    <tr>
        <td>@LocalizationService.GetLocalizedHtmlString("Date")</td>
        <td>
            @DateTime.Now.ToLongDateString()
        </td>
    </tr>
    <tr>
        <td>@LocalizationService.GetLocalizedHtmlString("Currency")</td>
        <td>
            @(10000.00.ToString("c"))
        </td>
    </tr>
    <tr>
        <td>@LocalizationService.GetLocalizedHtmlString("Number")</td>
        <td>
            @(188.45m.ToString("F2"))
        </td>
    </tr>
</table>
<script>
    function SetCulture(selectedValue) {
        var culture = "/?culture=" + selectedValue + "&ui-culture=" + selectedValue;
        document.getElementById("cultureForm").action = culture;
        document.getElementById("cultureForm").submit();
    }
</script>