public void TestProxiesDirtyRowsOnly()
{
EmployeeCollection coll = new EmployeeCollection();
Employee e = coll.AddNew();
e.EmployeeID = 1;
e.FirstName = "unchanged";
e.LastName = "unchanged";
e = coll.AddNew();
e.EmployeeID = 2;
e.FirstName = "unchanged";
e.LastName = "unchanged";
e = coll.AddNew();
e.EmployeeID = 3;
e.FirstName = "deleted";
e.LastName = "deleted";
coll.AcceptChanges();
coll[2].MarkAsDeleted();
e = coll.AddNew();
e.EmployeeID = 4;
e.FirstName = "Added";
e.LastName = "Added";
EmployeeCollectionProxyStub proxy = new EmployeeCollectionProxyStub(coll);
string qq = esDataContractSerializer.ToXml(proxy);
}