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POExplicit construction of entity type '###' in query is not allowed.
 

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  1. POExplicit construction of entity type '###' in query is not allowed.
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    <p>Using Linq commands and Linq To SQL datacontext, Im trying to instance an Entity called "Produccion" from my datacontext in this way: </p> <pre><code>Demo.View.Data.PRODUCCION pocoProduccion = ( from m in db.MEDICOXPROMOTORs join a in db.ATENCIONs on m.cmp equals a.cmp join e in db.EXAMENXATENCIONs on a.numeroatencion equals e.numeroatencion join c in db.CITAs on e.numerocita equals c.numerocita where e.codigo == codigoExamenxAtencion select new Demo.View.Data.PRODUCCION { cmp = a.cmp, bonificacion = comi, valorventa = precioEstudio, codigoestudio = lblCodigoEstudio.Content.ToString(), codigopaciente = Convert.ToInt32(lblCodigoPaciente.Content.ToString()), codigoproduccion = Convert.ToInt32(lblNroInforme.Content.ToString()), codigopromotor = m.codigopromotor, fecha = Convert.ToDateTime(DateTime.Today.ToShortDateString()), numeroinforme = Convert.ToInt32(lblNroInforme.Content.ToString()), revisado = false, codigozona = (c.codigozona.Value == null ? Convert.ToInt32(c.codigozona) : 0), codigoclinica = Convert.ToInt32(c.codigoclinica), codigoclase = e.codigoclase, } ).FirstOrDefault(); </code></pre> <p>While executing the above code, I'm getting the following error that the stack trace is included: </p> <pre><code>System.NotSupportedException was caught Message="The explicit construction of the entity type 'Demo.View.Data.PRODUCCION' in a query is not allowed." Source="System.Data.Linq" StackTrace: en System.Data.Linq.SqlClient.QueryConverter.VisitMemberInit(MemberInitExpression init) en System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) en System.Data.Linq.SqlClient.QueryConverter.Visit(Expression node) en System.Data.Linq.SqlClient.QueryConverter.VisitSelect(Expression sequence, LambdaExpression selector) en System.Data.Linq.SqlClient.QueryConverter.VisitSequenceOperatorCall(MethodCallExpression mc) en System.Data.Linq.SqlClient.QueryConverter.VisitMethodCall(MethodCallExpression mc) en System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) en System.Data.Linq.SqlClient.QueryConverter.Visit(Expression node) en System.Data.Linq.SqlClient.QueryConverter.VisitFirst(Expression sequence, LambdaExpression lambda, Boolean isFirst) en System.Data.Linq.SqlClient.QueryConverter.VisitSequenceOperatorCall(MethodCallExpression mc) en System.Data.Linq.SqlClient.QueryConverter.VisitMethodCall(MethodCallExpression mc) en System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) en System.Data.Linq.SqlClient.QueryConverter.ConvertOuter(Expression node) en System.Data.Linq.SqlClient.SqlProvider.BuildQuery(Expression query, SqlNodeAnnotations annotations) en System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) en System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute[S](Expression expression) en System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source) en Demo.View.InformeMedico.realizarProduccionInforme(Int32 codigoExamenxAtencion, Double precioEstudio, Int32 comi) en D:\cs_InformeMedico\app\InformeMedico.xaml.cs:línea 602 en Demo.View.InformeMedico.UpdateEstadoEstudio(Int32 codigo, Char state) en D:\cs_InformeMedico\app\InformeMedico.xaml.cs:línea 591 en Demo.View.InformeMedico.btnGuardar_Click(Object sender, RoutedEventArgs e) en D:\cs_InformeMedico\app\InformeMedico.xaml.cs:línea 683 InnerException: </code></pre> <p>Is that now allowed in LINQ2SQL?</p>
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