如何使用linq将命名空间添加到特定属性？

using System;
using System.Linq;

namespace MyNamespace
{
    class Program
    {
        static void Main(string[] args)
        {
            var properties = typeof(MyClass).GetProperties()
                .Where(p => p.PropertyType.Namespace == "System")
                .ToList();

            foreach (var property in properties)
            {
                Console.WriteLine(property.Name);
            }
        }
    }

    class MyClass
    {
        public int MyProperty { get; set; }
        public string MyString { get; set; }
        public DateTime MyDateTime { get; set; }
    }
}