Non Ascii characters in data annotations with Entity Framework

Question

I'm trying to add some validation checks to my model in MVC web application like this:

    [Display(Name = "Şube")]
    public decimal BranchId { get; set; }

But non ascii characters like "ş, ğ" doesn't render correctly. I don't have any similar problems like this in website itself, it only happens in data annotation values.

Any ideas?