My app is ASP.NET.  Maybe it is a security issue?  Here are some code
snippets:

public class WebForm1 : System.Web.UI.Page
{
     [MaintainState(StateType.View)]         // This user-defined attribute
does not show up in list.
     private String MyValue;                      // If I change this to
public, it works fine.
....

} // end of class

-----------------------------------------------------
The attribute class is defined as follows:

[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property)]
public class MaintainStateAttribute : Attribute
{
   private StateType _SType;

 public MaintainStateAttribute(StateType S)        // StateType is an
enumerator.
 {
    _SType = S;
 }

// This static method in the attribute class tries to get the attributes for
the passed in object.
// The object passed in is of the class defined WebForm1 (snippet shown
above).
public static void GetAttrs(object StateObj)
{
        Type T = StateObj.GetType();
        int Count = 0;
        MemberInfo[] MemberArray;
        object[] AttributeArray;

        MemberArray = T.GetMembers(BindingFlags.Instance |
BindingFlags.Static |
                                      BindingFlags.Public |
BindingFlags.NonPublic);

        foreach (MemberInfo M in MemberArray)
        {
           AttributeArray =
M.GetCustomAttributes(typeof(MaintainStateAttribute),true);

           foreach(MaintainStateAttribute A in AttributeArray)
           {
              ++Count;
           }
        }

// Count is 0 when I get here.
}
}

public enum StateType
{
   Application,
   Session,
   View,
   Cookie
}