Linqpad Script to scrape every DSCOVR photo of earth

DSCOVR.linq

<Query Kind="Program">
  <Reference>&lt;ProgramFilesX86&gt;\Microsoft ASP.NET\ASP.NET Web Pages\v2.0\Assemblies\System.Web.Helpers.dll</Reference>
  <Namespace>System.Net</Namespace>
  <Namespace>System.Threading</Namespace>
  <Namespace>System.Threading.Tasks</Namespace>
  <Namespace>System.Web.Helpers</Namespace>
</Query>

//Requires the following additional namespace imports:
//System.Net
//System.Threading
//System.Threading.Tasks
//System.Web.Helpers

//Requires the following additional reference:
//System.Web.Helpers.dll

//This script scrapes images of earth from http://epic.gsfc.nasa.gov/, becuase I could not find a way to download them automatically.
//Ideally used to fuel a folder with desktop wallpaper.

//You can get Linqpad here: http://www.linqpad.net/

void Main()
{
	WebClient client = new WebClient();

	string destination_folder = Environment.GetFolderPath(System.Environment.SpecialFolder.Desktop) + @"\DSCOVR\";

	if (Directory.Exists(destination_folder) == false)
		Directory.CreateDirectory(destination_folder);



	int image_count = 0;
	int days_old = 1;
	string format_str = "yyyyMMddHHmmss";
	
	do
	{
		DateTime target_date = DateTime.Today.AddDays(0 - days_old); //yesterday.
		days_old++;
		String api_url = "http://epic.gsfc.nasa.gov/api/images.php?date=" + target_date.ToString("yyyy-MM-dd");

		var raw_jason = client.DownloadString(api_url);

		var json_list = Json.Decode(raw_jason) as IEnumerable<dynamic>;

		var image_names = json_list.Select(x => (string)x.image);

		image_names.Dump();
		
		image_count = image_names.Count();

		if (image_names.Any())
		{
			foreach (string image_name in image_names)
			{
				string image_url = @"http://epic.gsfc.nasa.gov/epic-archive/png/" + image_name + ".png";
				string file_name = image_name + ".png";
				string full_file_name = destination_folder + file_name;
				if (File.Exists(full_file_name) == false)
				{
					client.DownloadFile(image_url, full_file_name);
					("Finished downloading " + file_name).Dump();

					string date_str = full_file_name.Substring(full_file_name.LastIndexOf("epic_1b_") + "epic_1b_".Length);
					date_str = date_str.Substring(0, date_str.IndexOf("_"));
					var date = DateTime.ParseExact(date_str, format_str, System.Globalization.CultureInfo.InvariantCulture);
					
					File.SetCreationTimeUtc( full_file_name, date );
				}
			}
		}
	}
	while (image_count > 0);
	"Done".Dump();
	return;

}