PostSharp:删除/替换后台字段

我想知道PostSharp是否可以很容易地通过删除/替换后台字段来改变类的结构。

示例如下:

假设我有以下实体

class DataItem
{
  public Int32 Id { get; set; }
  public String Name { get; set; }
  public Decimal? HourlyRateMon { get; set; }
  public Decimal? HourlyRateTue { get; set; }
  public Decimal? HourlyRateWed { get; set; }
  public Decimal? HourlyRateThu { get; set; }
  public Decimal? HourlyRateFri { get; set; }
}

将在64位上使用4 + 8 + 5*20 + 16字节的开销=每个实例128字节。

我想做的是应用一个方面，通过打包可空的小数来最小化对象的内存占用-就像

internal class DataItem
{
  private CompactDecimal _hourlyRateFri;
  private CompactDecimal _hourlyRateMon;
  private CompactDecimal _hourlyRateThu;
  private CompactDecimal _hourlyRateTue;
  private CompactDecimal _hourlyRateWed;
  public int Id { get; set; }
  public string Name { get; set; }
  public decimal? HourlyRateMon
  {
    get { return _hourlyRateMon; }
    set { _hourlyRateMon = value; }
  }
  public decimal? HourlyRateTue
  {
    get { return _hourlyRateTue; }
    set { _hourlyRateTue = value; }
  }
  public decimal? HourlyRateWed
  {
    get { return _hourlyRateWed; }
    set { _hourlyRateWed = value; }
  }
  public decimal? HourlyRateThu
  {
    get { return _hourlyRateThu; }
    set { _hourlyRateThu = value; }
  }
  public decimal? HourlyRateFri
  {
    get { return _hourlyRateFri; }
    set { _hourlyRateFri = value; }
  }
}
internal struct CompactDecimal
{
  public uint Offset;
  public static implicit operator decimal?(CompactDecimal d)
  {
    // here I can, for instance, go to a shared stream at the stream offset and read the decimal
  }
  public static implicit operator CompactDecimal(decimal? d)
  {
    // here I can, for instance, serialize the decimal to a shared stream and get the stream offset
  }
}

将在64位上使用4 + 8 + 5*4 + 16字节的开销=每个实例48字节，每个实例节省80字节。如果我们需要存储数百万个实例，它可以节省大量内存。

我试图创建一个locationinterceptionaspectderived属性，但我没有得到预期的结果-不仅原来的后台字段仍然存在，而且我有10个实例的TestAttribute(5个属性，get/set为每个):

// Fields
[NonSerialized]
private TestAttribute <>z__aspect10;
[NonSerialized]
private TestAttribute <>z__aspect11;
[NonSerialized]
private TestAttribute <>z__aspect12;
[NonSerialized]
private TestAttribute <>z__aspect13;
[NonSerialized]
private TestAttribute <>z__aspect4;
[NonSerialized]
private TestAttribute <>z__aspect5;
[NonSerialized]
private TestAttribute <>z__aspect6;
[NonSerialized]
private TestAttribute <>z__aspect7;
[NonSerialized]
private TestAttribute <>z__aspect8;
[NonSerialized]
private TestAttribute <>z__aspect9;
private decimal? <HourlyRateFri>k__OriginalField;
private decimal? <HourlyRateMon>k__OriginalField;
private decimal? <HourlyRateThu>k__OriginalField;
private decimal? <HourlyRateTue>k__OriginalField;
private decimal? <HourlyRateWed>k__OriginalField;

要么是我做错了什么，要么是PostSharp不支持我想要实现的目标。

TestAttribute现在不做任何事情-

[Serializable]
public class TestAttribute : LocationInterceptionAspect, IInstanceScopedAspect
{
  public override void CompileTimeInitialize(LocationInfo targetLocation, AspectInfo aspectInfo)
  {
    //base.CompileTimeInitialize(targetLocation, aspectInfo);
  }
  #region <<< Public methods >>>
  public Object CreateInstance(AdviceArgs adviceArgs)
  {
    return MemberwiseClone();
  }
  public override void OnGetValue(LocationInterceptionArgs args)
  {
    //args.
    //base.OnGetValue(args);
  }
  public override void OnSetValue(LocationInterceptionArgs args)
  {
    //base.OnSetValue(args);
  }
  public void RuntimeInitializeInstance()
  {
  }
  #endregion
}