WCF Data Service Partial class property on the client causes SaveContext exceptions - silverlight-4.0

Question

I have a WCF Data Service running that is exposing an EDM. There are several properties I needed on the client side, that the database doesn't need to know about. After setting all that up I got to testing the SaveContext method and get this error on the server "Error processing request stream. The property name 'CanDelete' specified for type 'DataModels.Customer' is not valid."
Is there a way to tell WCF Data Services on the client side to ignore this property? Or should I move to RIA Serivces? I've read that setting the property to internal will do this, but I need the property for binding and I have the client UI code in a different project (de-coupling my SL applications from my data service).
on the client I have:
public partial class Customer
{
private bool canDelete;
/// <summary>
/// Gets or sets a value indicating whether this instance can be deleted.
/// </summary>
/// <value>
/// <c>true</c> if this instance can delete; otherwise, <c>false</c>.
private bool canDelete;
/// <summary>
/// Gets or sets a value indicating whether this instance can be deleted.
/// </summary>
/// <value>
/// <c>true</c> if this instance can delete; otherwise, <c>false</c>.
/// </value>
public bool CanDelete
{
get
{
return this.canDelete;
}
set
{
if (this.canDelete != value)
{
this.canDelete = value;
this.OnPropertyChanged("CanDelete");
}
}
}
}

Answer 1

I had the exact same problem and adapted some code below from
extending partial designer classes
It simply involves hooking the WritingEntity Event inside a partial class of the Context.
I added my own attribute (IgnorePropertyAttribute) so I could attach it to other properties.
Would of course be nice if the attribute wasnt inserted in the first place but this worked for me
public sealed class IgnorePropertyAttribute : Attribute
{
}
...
partial void OnContextCreated()
{
this.WritingEntity += MyDataContext_WritingEntity;
}
private void MyDataContext_WritingEntity(object sender, System.Data.Services.Client.ReadingWritingEntityEventArgs e)
{
//
foreach (XElement node in e.Data.Elements())
{
if (node != null && node.Name.LocalName == "content")
{
foreach (XElement el in node.Elements())
{
if (el.Name.LocalName == "properties")
{
foreach (XElement prop in el.Elements())
{
if(e.Entity.GetType().GetProperty(prop.Name.LocalName).GetCustomAttributes(typeof(IgnorePropertyAttribute), true).Length > 0)
{
prop.Remove();
}
}
}
}
}
}
}