为什么= ViewData [“”]会显示一个字符串但是对同一个字符串进行评估会失败？

//CHECK IF WE SHOULD SHOW THE PASSWORD HINT OR NOT
Setting passwordhints;

using (var db = new dbDataContext())
{
    passwordhints = (from c in db.Settings
            where c.Name == "ShowPasswordHints" && c.ID == _ID
            select c).FirstOrDefault();
}

if (passwordhints != null)
    //NOTE: .Value IS A STRING
    ViewData["ShowPasswordHints"] = passwordhints.Value;
else
    ViewData["ShowPasswordHints"] = "False";

//END PASSWORD HINTS CHECK
//CHECK IF WE SHOULD SHOW THE PASSWORD HINT OR