System.ArgumentException: An item with the same key has already been added.
at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at System.Data.Linq.IdentityManager.StandardIdentityManager.SetCurrent(MetaType type)
at System.Data.Linq.IdentityManager.StandardIdentityManager.Find(MetaType type, Object[] keyValues)
at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.TryGetCachedObject(Object[] keyValues, T& cached)
at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.Execute(Object instance)
at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source)
at System.Data.Linq.EntityRef`1.get_Entity()
at CompiledRazorTemplates.Dynamic.cabbaaabaa.Execute()
at RazorEngine.Templating.TemplateBase.Run(ExecuteContext context)
at System.Web.Mvc.HtmlTemplateBase`1.Run(ExecuteContext context)
at CMS.Core.ITemplateExtensions.Run[T](ITemplate template, T Model)
at CMS.Core.ITemplateExtensions.Parse[T](String template, T Model)

Low-Cost Masking/NonMasking SMS in Bangladesh - Alpha SMS

Alpha SMS is an advanced SMS service provider in Bangladesh with multiple services such as Bulk SMS, SMS API, OTP SMS, SMS Gateway, SMS Marketing, Masking SMS, Non-Masking, etc. It provides a powerful and easy-to-use SMS API for developers. Easy integration with Software Applications & Websites. You can also send SMS messages directly through SMS Web Panel (Dashboard). Fast and easy to use SMS Gateway for School, Small Business SMS marketing, ISP & NGO in Bangladesh. Alpha SMS also offers API Integration with Corporate applications.

Visit Website
Low-Cost Masking/NonMasking SMS in Bangladesh - Alpha SMS

A National Archive of Information

170

Publishers

Featuring complete portfolio & virtual showroom of 170 active Publishers in Bangladesh.

Stay Informed of News & Events

ABOUT BOOKS.COM.BD

books.com.bd is a catalog of Bangla Books, featuring over 27,500+ Books from authors of past and present. This Website is a part of Publishers E-Platform, a national archive and repository of Publishers, Authors & Books in Bangladesh. books.com.bd has been Designed, Developed & Hosted by Alpha Net, leading Web Hosting & Domain Name Registration Company in Bangladesh.