[问题]C# 结构体对齐:如何将变长byte数组对齐

[StructLayout(LayoutKind.Sequential,Pack=1)]
struct Report_Read_Parameter
{
    byte Confirmation;
    byte ListID;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
    byte[] ParameterID;
    byte Length;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = ***)] // based on the Length
    byte[] ParameterValue;
    byte Status;
}

问题来了,怎么根据结构体里的字段Length来确定byte数组ParameterValue 的长度?

如何实现动态对齐?

在网上查了一下,但凡是声明为ByValArray类型,就必须要跟上SizeConst,而且设置SizeConst=Length时,编译器会报错

"An object reference is required for the non-static field, method, or property 'NGK.BLL.Commands.Report.Report_Read_Parameter.Length'"