3-tier Silverlightarchitecture

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XAML

Silverlight

If any one has any demo project of 3-tier Silverlightarchitecture , Please give me. I am new to these Silverlight architecture. alredy created sliverlight enable wcf service like this i have one class rrf1 in that public class RRF1 { [DataMember] public List<ddllocation> LocationList { get; set; } } i created one class . that i implemented in [DataContract] public class ddlLocation { private int _key; private string _value; [DataMember] public int Key { get { return _key; } set { _key = value; } } [DataMember] public string Value { get { return _value; } set { _value = value; } } } and Declaration #region Method Declaration [ServiceContract] public interface IRRFInsert { [OperationContract] List<ddllocation> getLocationDropdown(); } and i used #region Getting Location Values in to the dropdown public List<ddllocation> getLocationDropdown() { List<ddllocation> ddlLocationList = new List<ddllocation>(); SqlConnection objCon = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnStr"].ToString()); DataSet dsLocation = new DataSet(); SqlCommand cmdLocation = new SqlCommand(); cmdLocation.Connection = objCon; cmdLocation.CommandText = "usp_Synapse_REC_GetddlLocation"; cmdLocation.CommandType = CommandType.StoredProcedure; SqlDataAdapter adaLocation = new SqlDataAdapter(cmdLocation); //"select LOCATION_ID_PK, LOCATION_NAME from sip_Location_master ORDER BY LOCATION_NAME" try { objCon.Open(); adaLocation.Fill(dsLocation); for (int i = 0; i < dsLocation.Tables[0].Rows.Count; i++) { ddlLocation obj = new ddlLocation(); obj.Key = Convert.ToInt32(dsLocation.Tables[0].Rows["LOCATION_ID_PK"]); obj.Value = dsLocation.Tables[0].Rows["LOCATION_NAME"].ToString(); ddlLocationList.Add(obj); } } catch { } finally { cmdLocation.Dispose(); objCon.Close(); objCon.Dispose(); } return ddlLocationList; } #endregion and i gave ref to client bin.. it's working fine.. but i don't want like this every time i don't want creat connect,command.. ect.. that want i want one framework layer , bussness layer, sevice layer to avoid single layer . i think u got my question :P . please help me