How do I compare values[] array with the WeatherStationId?

using System;
using System.IO;

namespace Treehouse.CodeChallenges
{
    public class Program
    {
        public static void Main(string[] arg)
        {
        }

        // 1. Create a static method named ParseWeatherForecast that takes a string[] parameter named values and returns a WeatherForecast. 
        public static WeatherForecast ParseWeatherForecast(string[] values)
        {
            // 2. Instantiate a WeatherForecast variable named weatherForecast 
            // and assign the appropriate value in the values array to the WeatherStationId property.
            var weatherForecast = new WeatherForecast();

            // 3. Use the sample data shown in WeatherForecast.cs to determine which value in the array is the WeatherStationId.
            int values_lenght = values.lenght();
            for(int i = 0; values_lenght > i; i++)
            {
                // verify if the current value is the WeatherStationId 
                weatherForecast.WeatherStationId;
            }

            // 4. Don't forget to return the weatherForecast in the new method!
            return weatherForecast;
        }
    }
}

using System;

/* 
Sample CSV Data 

weather_station_id,time_of_day,condition,temperature,precipitation_chance,precipitation_amount
HGKL8Q,06/11/2016 0:00,Rain,53,0.3,0.03
HGKL8Q,06/11/2016 6:00,Cloudy,56,0.08,0.01
HGKL8Q,06/11/2016 12:00,PartlyCloudy,70,0,0
HGKL8Q,06/11/2016 18:00,Sunny,76,0,0
HGKL8Q,06/11/2016 19:00,Clear,74,0,0
*/

namespace Treehouse.CodeChallenges
{
    public class WeatherForecast
    {
        public DateTime WeatherStationId { get; set; }
    }
}