Fix for mapping private properties on base types

Author: schotime

src/NPoco/PocoData.cs

@@ -322,10 +322,7 @@ public Delegate GetFactory(string sql, string connString, int firstColumn, int c
                                         il.Emit(OpCodes.Newobj, dstType.GetConstructor(new Type[] { Nullable.GetUnderlyingType(dstType) }));
                                     }
 
-                                    if (pc.MemberInfo.IsField())
-                                        il.Emit(OpCodes.Stfld, (FieldInfo)pc.MemberInfo);
-                                    else 
-                                        il.Emit(OpCodes.Callvirt, ((PropertyInfo)pc.MemberInfo).GetSetMethod(true)); // poco
+                                    PushMemberOntoStack(il, pc); //poco
                                     Handled = true;
                                 }
                             }
@@ -348,10 +345,7 @@ public Delegate GetFactory(string sql, string connString, int firstColumn, int c
                                 // Assign it
                                 il.Emit(OpCodes.Unbox_Any, pc.MemberInfo.GetMemberInfoType());          // poco,poco,value
 
-                                if (pc.MemberInfo.IsField())
-                                    il.Emit(OpCodes.Stfld, (FieldInfo)pc.MemberInfo);
-                                else 
-                                    il.Emit(OpCodes.Callvirt, ((PropertyInfo)pc.MemberInfo).GetSetMethod(true)); 		// poco
+                                PushMemberOntoStack(il, pc); //poco
                             }
 
                             if (_emptyNestedObjectNull)
@@ -402,6 +396,14 @@ public Delegate GetFactory(string sql, string connString, int firstColumn, int c
             return fac;
         }
 
+        private static void PushMemberOntoStack(ILGenerator il, PocoColumn pc)
+        {
+            if (pc.MemberInfo.IsField())
+                il.Emit(OpCodes.Stfld, (FieldInfo) pc.MemberInfo);
+            else
+                il.Emit(OpCodes.Callvirt, ((PropertyInfo) pc.MemberInfo).GetSetMethodOnDeclaringType());
+        }
+
         private static void AddConverterToStack(ILGenerator il, Func<object, object> converter)
         {
             if (converter != null)

src/NPoco/ReflectionUtils.cs

@@ -67,5 +67,14 @@ public static void SetMemberInfoValue(this MemberInfo member, object obj, object
             else
                 ((PropertyInfo)member).SetValue(obj, value, null);
         }
+
+        public static MethodInfo GetSetMethodOnDeclaringType(this PropertyInfo propertyInfo)
+        {
+            var methodInfo = propertyInfo.GetSetMethod(true);
+            return methodInfo ?? propertyInfo
+                                    .DeclaringType
+                                    .GetProperty(propertyInfo.Name)
+                                    .GetSetMethod(true);
+        }
     }
 }