<DataContract()>  _
Public Class Person
    ' This member is serialized.
    <DataMember()>  _
    Friend FullName As String
    
    ' This is serialized even though it is private.
    <DataMember()>  _
    Private Age As Integer
    
    ' This is not serialized because the DataMemberAttribute 
    ' has not been applied.
    Private MailingAddress As String
    
    ' This is not serialized, but the property is.
    Private telephoneNumberValue As String
            
    <DataMember()>  _
    Public Property TelephoneNumber() As String 
        Get
            Return telephoneNumberValue
        End Get
        Set
            telephoneNumberValue = value
        End Set
    End Property
End Class 

using System;
using System.Runtime.Serialization;

[DataContract]
public class Person
{
    // This member is serialized.
    [DataMember]
    internal string FullName;

    // This is serialized even though it is private.
    [DataMember]
    private int Age;

    // This is not serialized because the DataMemberAttribute 
    // has not been applied.
    private string MailingAddress;

    // This is not serialized, but the property is.
    private string telephoneNumberValue;

    [DataMember]
    public string TelephoneNumber
    {
        get { return telephoneNumberValue; }
        set { telephoneNumberValue = value; }
    }
}