FieldInfo[]type.getFields()的顺序是否有保证?

目前我做的事情如下:

class Foo {
    // Declare Fields
    [FieldName("F_BAR")] public int?    Bar;
    [FieldName("F_BAZ")] public int?    Baz;
    [FieldName("BLARG")] public double? Bee;

    // And a custom selector
    public static string FooFields() {
        // which looks something like:
        StringBuilder fields = new StringBuilder();
        foreach( FieldInfo f in typeof(Foo).GetFields() )
            fields.Append(", " +
                f.GetCustomAttributes(
                    typeof(FieldNameAttribute),
                    false)[0].FieldName );
        return fields.ToString().Substring(2);
    }
    // .. which will be used like this:
    public static string ExampleSelect() {
        return "select " + Foo.FooFields() + " from tablename";
    }

    // And a custom reader, formatted for the custom selector
    public static Foo Read(DbDataReader reader) {
        int i = -1;
        return new Foo {
            Bar = reader.IsDBNull(++i)
                ? (int?)null
                : Convert.ToInt32(reader.GetValue(i)),
            Baz = reader.IsDBNull(++i)
                ? (int?)null
                : Convert.ToInt32(reader.GetValue(i)),
            Bee = reader.IsDBNull(++i)
                ? (double?)null
                : Convert.ToDouble(reader.GetValue(i))
        };
    }
}

目前,它是有效的。我今天意识到,这取决于从 GetFields() 按照我在课堂上宣布的顺序。这总是预期的行为吗?只在.NET中?

编辑:如果有 cases 当它不起作用时,我能假设它会起作用,只要我不做任何事情来破坏缓存吗?