A generic RESTful update method using reflection

GenericRESTfulUpdate.cs

public static bool Update<T>(long id, T updatedObj)
{
    using (DBContext db = new DbContext())
    {
        var originalObj = db.T.Where(x => x.id == id).FirstOrDefault();
        var rawObj = new T();
        if (originalObj != null)
        {
            foreach (PropertyInfo propertyInfo in updatedObj.GetType().GetProperties())
            {
                var upvalue = propertyInfo.GetValue(updatedObj);
                var origvalue = propertyInfo.GetValue(originalObj);
                var rawvalue = propertyInfo.GetValue(rawObj);

                if (upvalue == null || Nullable.GetUnderlyingType(poivalue.GetType()) != null)
                {
                    if ((upvalue!=null && origvalue!=null && rawvalue != null) && !upvalue.Equals(origvalue) && !upvalue.Equals(rawvalue))
                    {
                        propertyInfo.SetValue(originalObj, propertyInfo.GetValue(updatedObj));
                    }
                }
                else
                {
                    if (!poivalue.Equals(origvalue))
                    {
                        propertyInfo.SetValue(originalObj, propertyInfo.GetValue(updatedObj));
                    }
                }

            }
            db.SaveChanges();

            return true;
        }

        return false;
    }
}

needs refining more to make it 100% bullet proof and REST compliant