Question

Is this possible at all?

...
Int32? Id = 1;
QDataContext qDataContext = new QDataContext();
var q= from p in qDataContext.GetProcedurePersonas(Id) 
       select p.name, p.last;
...

When I run this, I get an error:

Could not find an implementation of the query pattern for source type
‘System.Data.Linq.ISingleResult WcfService1.GetProcedurePersonasResult’.
‘Select’ not found. Are you missing a reference to ‘System.Core.dll’
or a using directive for ‘System.Linq’?

Also I have this and work perfectly

...
Int32? Id = 1;
QDataContext qDataContext = new QDataContext();
var q= qDataContext.GetProcedurePersonas(Id);
...

Answer 1

if you already have the

QDataContext qDataContext = new QDataContext();
var q= qDataContext.GetProcedurePersonas(Id);

and for instance you want to select something specific from q you may do.

var specific=(from c in q where c.columnvalue == yourValue select c.columnvalue).ToList();

to serialize to json you may use

 JavaScriptSerializer jss = new JavaScriptSerializer();
    string json = jss.Serialize(specific);