System.Resources.ResourceWriterTests.ResourceReaderTests.Exception_incorrect_magic_number C# (CSharp) Méthode

        public static void Exception_incorrect_magic_number()
        {
            using (var ms2 = new MemoryStream())
            {
                using (var rw = GenerateResourceStream(s_dict, ms2))
                {
                    ms2.Seek(0L, SeekOrigin.Begin);
                    using (var bw = new BinaryWriter(ms2))
                    {
                        bw.Write(2000);//Our resource reader expects the ResourceManager magic number here

                        //  ms2.Seek(0L, SeekOrigin.Begin);
                        Assert.Throws<ArgumentException>(() =>
                        {
                            var resReader = new ResourceReader(ms2);
                        });
                    }
                }
            }
        }
        [Fact]