问Windows 8，.NET 4.5 DefineUninitializedData问题

EN

using System;
using System.IO;
using System.Reflection;
using System.Reflection.Emit;
using System.Threading;

namespace sdata
{
    class Program
    {
        static void Main( string[] args )
        {
            AssemblyName name = new AssemblyName( );
            name.Name = "sdatatest.exe";
            string exepath = "c:\\temp\\" + name.Name;
            name.CodeBase = "file:://" + exepath;
            AssemblyBuilder ass_bldr = Thread.GetDomain( ).DefineDynamicAssembly( name, AssemblyBuilderAccess.RunAndSave, Path.GetDirectoryName( exepath ));
            ModuleBuilder module_bldr = ass_bldr.DefineDynamicModule( Path.GetFileName( exepath ), Path.GetFileName( exepath ), true );
            TypeBuilder tb = module_bldr.DefineType( "sdata", TypeAttributes.Public | TypeAttributes.AnsiClass );
            TypeBuilder sixteen = module_bldr.DefineType( "sixteen", TypeAttributes.Sealed, typeof( ValueType ), PackingSize.Size8, 16 ); // value type of size 16
            Type t16 = sixteen.CreateType( );
            var fb = tb.DefineUninitializedData( "blank16", 16, FieldAttributes.Public | FieldAttributes.Static );
            ConstructorBuilder cons = tb.DefineConstructor( MethodAttributes.Static, CallingConventions.Standard, Type.EmptyTypes ); // ..cctor
            var il = cons.GetILGenerator( );
            il.BeginScope( );
            il.Emit( OpCodes.Ldsflda, fb );
            il.Emit( OpCodes.Ldc_I4, 0 );
            il.Emit( OpCodes.Ldc_I4, 16 );
            il.Emit( OpCodes.Initblk );
            il.Emit( OpCodes.Ret );
            il.EndScope( );
            MethodBuilder mb = tb.DefineMethod( "main", MethodAttributes.Static | MethodAttributes.Public );
            il = mb.GetILGenerator( );
            il.BeginScope( );
            il.Emit( OpCodes.Ldsflda, fb );
            il.Emit( OpCodes.Pop );
            il.Emit( OpCodes.Ret );
            il.EndScope( );
            tb.CreateType( );
            ass_bldr.SetEntryPoint( mb );
            ass_bldr.Save( Path.GetFileName( exepath ) );
        }
    }
}