Pass variable as parameter to where clause in Linq

Hi All,

      How to pass one variable value as parameter to where clause in Linq? Like In ado.net we using parameter to avoid sql injection. Below i providing my code.

    SettingsManager manager = new SettingsManager();
    var timeZone = manager.GetTImeZone().Where(x => x.TimeZoneId == timeZoneId.ToString()).FirstOrDefault();