How to consume WCF method with "DataSet" return type in Silverlight

10+ Methods in my WCF webservice returns an object of type DataSet

 public System.Data.DataSet ReturnData()
        {
            DataSet dataSet = new DataSet();
            //do some work on the dataset
            return dataSet;
        }

I want to consume this WCF webservice in my silverlight application.

Problem: DataSet is not resolved as System.Data.dll does not appear in the Silverlight application's add reference section.

Is there a workaround or a so开发者_运维知识库lution?

Take a look on DataSet for Silverlight Applications

But I advise you to write this into classes

Edit: To show you how you can use instead of the classe, I give you an example

  public class Person
    {
        private int gID;
        private String gFirstName="";
        private String gLastName = "";


        public int ID
        {
            get 
            {
                return gID;
            }
            set
            {
                gID = value;
            }
        }

        public String FirstName
        {
            get
            {
                return gFirstName;
            }
            set
            {
                gFirstName= value;
            }
        }


        public String LastName
        {
            get
            {
                return gLastName;
            }
            set
            {
                gLastName = value;
            }
        }
    }

.

   public class Persons
    {
        private List<Person> gListOfPerson;

        public List<Person> All
        {
            get
            {
                if (gListOfPerson == null)
                {
                    gListOfPerson= new List<Person>();
                }
                return gListOfPerson;
            }
            set
            {
                gListOfPerson=value;
            }
        }

    }

.

public Persons ReturnData()
{            
                 DataSet  vDS = new DataSet();
                 //get data from SQL Server or what ever in a DataSet...

                foreach(System.Data.DataTable t in vDS.Tables)
                {
                    Persons  vPersons = new Persons();
                    foreach(System.Data.DataRow dr in t.Rows)
                    {
                        Person vPerson = new Person();
                        int vtryInt;
                        int.TryParse(dr["ID"].ToString(), out vtryInt);
                        vPerson.ID = vtryInt;
                        vPerson.FirstName = dr["FirstName"].toString();
                        vPerson.LastName = dr["LastName"].toString();

                        vPersons.All.Add(vPerson);
                    }


                    return vPersons ;
 }