I have tried the following code using the 2.0 framework and I get an attribute back, but when I try this on the compact framework, it always returns an empty array. The MSDN documenation says its supported, am I doing something wrong?
Test x = new Test(); FieldInfo field_info = x.GetType().GetField("ArrayShorts"); object[] custom_attributes = field_info.GetCustomAttributes(typeof(MarshalAsAttribute), false); [StructLayout(LayoutKind.Sequential)] public struct Test { [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)] public ushort[] ArrayShorts; } 1 Answer
EDIT 2
So I'm checking with the CF team now but I believe you've found a bug. This shows it even better:
public class MyAttribute : Attribute { public MyAttribute(UnmanagedType foo) { } public int Bar { get; set; } } [StructLayout(LayoutKind.Sequential)] public struct Test { [CLSCompliant(false)] [MyAttribute(UnmanagedType.ByValArray, Bar = 4)] [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)] public ushort[] ArrayShorts; } class Program { static void Main(string[] args) { FieldInfo field_info = typeof(Test).GetField("ArrayShorts"); object[] custom_attributes = field_info.GetCustomAttributes(typeof(MarshalAsAttribute), false); Debug.WriteLine("Attributes: " + custom_attributes.Length.ToString()); custom_attributes = field_info.GetCustomAttributes(typeof(MyAttribute), false); Debug.WriteLine("Attributes: " + custom_attributes.Length.ToString()); custom_attributes = field_info.GetCustomAttributes(typeof(CLSCompliantAttribute), false); Debug.WriteLine("Attributes: " + custom_attributes.Length.ToString()); } } Under the full framework I get back this:
Attributes: 1 Attributes: 1 Attributes: 1 Under CF 3.5 I get this:
Attributes: 0 Attributes: 1 Attributes: 1 So you can see it's fully capable of returning an attribute, either custom or within the BCL, just not the MarshalAsAttribute.
EDIT 3 Alright, I did a little more digging, and it turns out that the CF behavior is actually correct if you go by the spec. It goes against all logic, but it's right.
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