程序代码：

class Program
{
    static void Main(string[] args)
    {
        Temp t = new Temp()
        {
            Age = 11, Id = "2", Name = "AA"
                                   };
        string name = t.GetValueByType("name"); //这里对应TEMP类的string name
        string id = t.GetValueByType("id");
        Console.WriteLine("{0},{1}", name, id);
    }
}

class Temp
{
    public string GetValueByType(string type)
    {
        FieldInfo fi = this.GetType().GetField(type,  BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.NonPublic);
        if (fi == null)
            return "";
        else
            return (string)fi.GetValue(this);
    }
    string name = "", id = "";
    int age = 0;

    public int Age
    {
        get { return age; }
        set { age = value; }
    }

    public string Name
    {
        get { return name; }
        set { name = value; }
    }

    public string Id
    {
        get { return id; }
        set { id = value; }
    }
}