diff --git a/compiler/cpp/src/thrift/generate/t_csharp_generator.cc b/compiler/cpp/src/thrift/generate/t_csharp_generator.cc
index 37d6f9d..9d1e29e 100644
--- a/compiler/cpp/src/thrift/generate/t_csharp_generator.cc
+++ b/compiler/cpp/src/thrift/generate/t_csharp_generator.cc
@@ -422,7 +422,7 @@
          + ((async_) ? "using System.Threading.Tasks;\n" : "") + "using Thrift;\n"
          + "using Thrift.Collections;\n" + ((serialize_ || wcf_) ? "#if !SILVERLIGHT\n" : "")
          + ((serialize_ || wcf_) ? "using System.Xml.Serialization;\n" : "")
-         + ((serialize_ || wcf_) ? "#endif\n" : "") + (wcf_ ? "//using System.ServiceModel;\n" : "")
+         + ((serialize_ || wcf_) ? "#endif\n" : "")
          + "using System.Runtime.Serialization;\n";
 }
 
@@ -903,7 +903,10 @@
 
   // make private members with public Properties
   for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
-    indent(out) << "private " << declare_field(*m_iter, false, "_") << endl;
+    // if the field is requied, then we use auto-properties
+    if (!field_is_required((*m_iter)) && (!nullable_ || field_has_default((*m_iter)))) {
+      indent(out) << "private " << declare_field(*m_iter, false, "_") << endl;
+    }
   }
   out << endl;
 
@@ -1475,7 +1478,7 @@
   generate_csharp_doc(f_service_, tservice);
 
   if (wcf_) {
-    indent(f_service_) << "[ServiceContract(Namespace=\"" << wcf_namespace_ << "\")]" << endl;
+    indent(f_service_) << "[System.ServiceModel.ServiceContract(Namespace=\"" << wcf_namespace_ << "\")]" << endl;
   }
   indent(f_service_) << "public interface ISync" << extends_iface << " {" << endl;
 
@@ -1487,12 +1490,12 @@
 
     // if we're using WCF, add the corresponding attributes
     if (wcf_) {
-      indent(f_service_) << "[OperationContract]" << endl;
+      indent(f_service_) << "[System.ServiceModel.OperationContract]" << endl;
 
       const std::vector<t_field*>& xceptions = (*f_iter)->get_xceptions()->get_members();
       vector<t_field*>::const_iterator x_iter;
       for (x_iter = xceptions.begin(); x_iter != xceptions.end(); ++x_iter) {
-        indent(f_service_) << "[FaultContract(typeof("
+        indent(f_service_) << "[System.ServiceModel.FaultContract(typeof("
           + type_name((*x_iter)->get_type(), false, false) + "Fault))]" << endl;
       }
     }
@@ -1514,7 +1517,7 @@
   generate_csharp_doc(f_service_, tservice);
 
   if (wcf_) {
-    indent(f_service_) << "[ServiceContract(Namespace=\"" << wcf_namespace_ << "\")]" << endl;
+    indent(f_service_) << "[System.ServiceModel.ServiceContract(Namespace=\"" << wcf_namespace_ << "\")]" << endl;
   }
   indent(f_service_) << "public interface IAsync" << extends_iface << " {" << endl;
 
@@ -1526,12 +1529,12 @@
 
     // if we're using WCF, add the corresponding attributes
     if (wcf_) {
-      indent(f_service_) << "[OperationContract]" << endl;
+      indent(f_service_) << "[System.ServiceModel.OperationContract]" << endl;
 
       const std::vector<t_field*>& xceptions = (*f_iter)->get_xceptions()->get_members();
       vector<t_field*>::const_iterator x_iter;
       for (x_iter = xceptions.begin(); x_iter != xceptions.end(); ++x_iter) {
-        indent(f_service_) << "[FaultContract(typeof("
+        indent(f_service_) << "[System.ServiceModel.FaultContract(typeof("
           + type_name((*x_iter)->get_type(), false, false) + "Fault))]" << endl;
       }
     }
@@ -1552,7 +1555,7 @@
   generate_csharp_doc(f_service_, tservice);
 
   if (wcf_) {
-    indent(f_service_) << "[ServiceContract(Namespace=\"" << wcf_namespace_ << "\")]" << endl;
+    indent(f_service_) << "[System.ServiceModel.ServiceContract(Namespace=\"" << wcf_namespace_ << "\")]" << endl;
   }
 
   indent(f_service_) << "public interface Iface" << extends_iface << " {" << endl;