System.InvalidOperationException: Sequence contains no elements 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.System.Data.Linq.Provider.IProvider.Execute(Expression query) at System.Data.Linq.Table`1.System.Linq.IQueryProvider.Execute[TResult](Expression expression) at System.Linq.Queryable.Single[TSource](IQueryable`1 source, Expression`1 predicate) at AlupNewV2.Manager.CatalogDataProvider.searchCategoryByID(Int32 PortalId, Int64 CategoryID, Int32 langID) at View.Page_Load(Object sender, EventArgs e)

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