Query Variable EntityFramework

For this you will have to make a more concrete linq

var result = from c in dbContext.Cliente
             select new {
                Identificacion = c.Identificacion,
                Nombre =c.Nombre,
                Contacto = c.Contacto.Where(x=> x.Estado && x.IdTipoContacto == 1)
                                        .Select(x=> x.Nombres )
            };

in this case just define the fields you need and filter the contacts associated with the client. It is assumed that between the client and their contacts there is a relationship that allows the association to navigate.

If you do not want to return an anonymous object, you are going to have to create a class such as:

public class ClienteDto{
   public int Identificacion {get;set;}
   public string Nombre {get;set;}
   public string Contacto {get;set;}
}

then the linq would be

var result = from c in dbContext.Cliente
             select new ClienteDto() {
                Identificacion = c.Identificacion,
                Nombre =c.Nombre,
                Contacto = c.Contacto.Where(x=> x.Estado && x.IdTipoContacto == 1)
                                        .Select(x=> x.Nombres )
            };

By making a query with LINQ you can solve the problem:

var elementos= from cliente in dbContext.Cliente
               Join contacto in dbContext.Contacto on contacto.IdCliente equals cliente.IdCliente
               Where contacto.Estado==true && contacto. IdTipoContacto == 1
Seletc new
{
identificacion=cliente.Identificacion
clienteNombre=cliente.Nombre
contactoNombre=contacto.Nombre
};
return elementos.toList();

This returns a list of anonymous objects with the fields -identification, -clientName, -contactsNombre ....

For what you want you could create a class where you will present the data you want: For example:

 class ClientePresenter
    {
public ClientePresenter(){}
    public int Id{get;set;}//esto para tener referencia de que registro es..
    public int Identificacion{get;set;}
    public string clienteNombre{get;set;}
    public string contactoNombre{get;set;}

    }

and then perform:

var result = from c in dbContext.Cliente
             select new ClientePresenter{
                Id=c.Id
                Identificacion = c.Identificacion,
                clienteNombre =c.Nombre,
                contactoNombre = c.Contacto.Where(x=> x.Estado && x.IdTipoContacto == 1)
                                        .Select(x=> x.Nombres )
            };