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System.InvalidOperationException: There is already an open DataReader associated with this Command which must be closed first.
at System.Data.SqlClient.SqlInternalConnectionTds.ValidateConnectionForExecute(SqlCommand command)
at System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.CompiledQuery.Execute(IProvider provider, Object[] arguments)
at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.ExecuteKeyQuery(Object[] keyValues)
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 System.Web.Mvc.PathExtensions.<>c.b__0_1(PartyProduct i) in E:\ERP\ERP.Web.Directory\Code\ErpExtensions.cs:line 14
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
at CompiledRazorTemplates.Dynamic.cafaeeacadaade.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)
@{var books = ERP.Data.DBContext.Current.Product.Active().OrderByDescending(i => i.DateUpdated).ToList();}

Recently Updated Books

@foreach(var item in books.Take(12)) {
View Book

@item.Name
@item.NativeName

@(item.Authors().Any()? item.Authors().First().NativeName:"")

@if(item.SalePrice.HasValue){

BDT @item.SalePrice.Value.ToString("0.00") BDT @item.ListPrice.Value.ToString("0.00")

}else if (item.ListPrice.HasValue) {

BDT @item.ListPrice.Value.ToString("0.00")

}
Details
Cart
}
Error: 
Value cannot be null.
Parameter name: writer

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

A National Archive of Information

170

Publishers

Featuring complete portfolio & virtual showroom of 170

Publishers

Featuring complete portfolio & virtual showroom of 170

Publishers

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

170 active Publishers in Bangladesh.

170 active Publishers in Bangladesh.

4,623

Authors

Portfolio of an ever growing list of legends. About 3,000 Bengali authors & Poets of the past, present & future.

4,623

Authors

Portfolio of an ever growing list of legends. About 3,000 Bengali authors & Poets of the past, present & future.

4,623

Authors

Portfolio of an ever growing list of legends. About 3,000 Bengali authors & Poets of the past, present & future.

29,332

Books

A complete online catalog of Bangla books. From the everlasting classics to modern literature of the future generation.