XML Serialization and Schema without xsd.exe

XmlReflectionImporter importer = new XmlReflectionImporter();
XmlSchemas schemas = new XmlSchemas();
XmlSchemaExporter exporter = new XmlSchemaExporter(schemas);
Type type = toSerialize.GetType();
XmlTypeMapping map = importer.ImportTypeMapping(type);
exporter.ExportTypeMapping(map);

TextWriter tw = new StreamWriter(fileName + ".xsd");
schemas[0].Write(tw);
tw.Close();

public class Test
    {
        [XmlAttribute()]
        public string Attribute { get; set; }
        public string Description { get; set; }

        [XmlArray(ElementName = "Customers")]
        [XmlArrayItem(ElementName = "Customer")]
        public List<CustomerClass> blah { get; set; }

    }

public static void AttachXmlAttributes(XmlAttributeOverrides xao, Type t)
    {
        List<Type> types = new List<Type>();
        AttachXmlAttributes(xao, types, t);
    }

    public static void AttachXmlAttributes(XmlAttributeOverrides xao, List<Type> all, Type t)
    {
        if(all.Contains(t))
            return;
        else
            all.Add(t);

        XmlAttributes list1 = GetAttributeList(t.GetCustomAttributes(false));
        xao.Add(t, list1);

        foreach (var prop in t.GetProperties())
        {
            XmlAttributes list2 = GetAttributeList(prop.GetCustomAttributes(false));
            xao.Add(t, prop.Name, list2);
            AttachXmlAttributes(xao, all, prop.PropertyType);
        }
    }

    private static XmlAttributes GetAttributeList(object[] attributes)
    {
        XmlAttributes list = new XmlAttributes();
        foreach (var attribute in attributes)
        {
            Type type = attribute.GetType();
            if (type.Name == "XmlAttributeAttribute") list.XmlAttribute = (XmlAttributeAttribute)attribute;
            else if (type.Name == "XmlArrayAttribute") list.XmlArray = (XmlArrayAttribute)attribute;
            else if (type.Name == "XmlArrayItemAttribute") list.XmlArrayItems.Add((XmlArrayItemAttribute)attribute);

        }
        return list;
    }
    public static string GetSchema<T>()
    {
        XmlAttributeOverrides xao = new XmlAttributeOverrides();
        AttachXmlAttributes(xao, typeof(T));

        XmlReflectionImporter importer = new XmlReflectionImporter(xao);
        XmlSchemas schemas = new XmlSchemas();
        XmlSchemaExporter exporter = new XmlSchemaExporter(schemas);
        XmlTypeMapping map = importer.ImportTypeMapping(typeof(T));
        exporter.ExportTypeMapping(map);

        using (MemoryStream ms = new MemoryStream())
        {
            schemas[0].Write(ms);
            ms.Position = 0;
            return new StreamReader(ms).ReadToEnd();
        }
    }