Download all springer books linqpad

async Task Main()
{
	if(!System.IO.Directory.Exists(_destinationFolder))
	{
		Directory.CreateDirectory(_destinationFolder);
	}
	
	foreach(var url in _urls)
	{
		await DownloadAsync(url);
	}
}

private static string _destinationFolder = "d:\\temp\\springer";
private HttpClient _client = new HttpClient(); 

private async Task DownloadAsync(string url)
{
	var doc = new HtmlDocument();
	using(var stream = await _client.GetStreamAsync(url))
	{
		doc.Load(stream);
		
		var bookTitle = doc.DocumentNode.SelectSingleNode("//div[@class='page-title']").InnerText.Trim();
		var pdfLink = doc.DocumentNode.SelectSingleNode("//a[contains(@href,'content/pdf')]");
		var epubLink = doc.DocumentNode.SelectSingleNode("//a[contains(@href,'download/epub')]");

		if(pdfLink != null)
		{
			await File.WriteAllBytesAsync(Path.Combine(_destinationFolder, $"{Safename(bookTitle)}.pdf"), await _client.GetByteArrayAsync($"http://link.springer.com/{pdfLink.Attributes["href"].Value}"));
		}

		if (epubLink != null)
		{
			await File.WriteAllBytesAsync(Path.Combine(_destinationFolder, $"{Safename(bookTitle)}.epub"), await _client.GetByteArrayAsync($"http://link.springer.com/{epubLink.Attributes["href"].Value}"));
		}
	}
}

private static string Safename(string text)
{
	string UrlPeplaceSpecialWords = Regex.Replace(text, @""|['"",&?%\.!()@$^_+=*:#/\\-]", " ").Trim();
	string RemoveMutipleSpaces = Regex.Replace(UrlPeplaceSpecialWords, @"\s+", " ");
	//string ReplaceDashes = RemoveMutipleSpaces.Replace(" ", " ");
	string DuplicateDashesRemove = RemoveMutipleSpaces.Replace("--", "-");
	return DuplicateDashesRemove.ToLower();
}

static string[] _urls = new[]
{
	"http://link.springer.com/openurl?genre=book&isbn=978-0-306-48048-5",
"http://link.springer.com/openurl?genre=book&isbn=978-0-306-48247-2",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-21736-9",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-22592-0",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-21777-2",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-28117-9",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-24158-6",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-32353-4",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-36218-2",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-36274-8",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-36601-2",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-37575-5",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-40065-5",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-45524-2",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-46271-4",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-46312-4",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-49312-1",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-68566-3",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-72071-5",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-72579-6",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-74365-3",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-75959-3",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-76501-3",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-77650-7",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-78341-3",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-79054-1",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-84858-7",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-87573-6",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-88698-5",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-88963-4",
"http://link.springer.com/openurl?genre=book&isbn=978-0-387-93837-0",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4020-5719-9",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4020-6099-1",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4020-6808-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-35963-7",
"http://link.springer.com/openurl?genre=book&isbn=978-3-662-44874-8",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-03762-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-56194-3",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-0400-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-27877-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-44794-0",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4419-9479-0",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-18842-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-48936-0",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-21239-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-7091-0715-7",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4419-6488-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-01851-5",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4939-3058-6",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-26551-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-662-46321-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-13072-9",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-4556-2",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4615-1077-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-02099-0",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-37434-0",
"http://link.springer.com/openurl?genre=book&isbn=978-981-10-2045-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-57040-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-23042-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-53883-9",
"http://link.springer.com/openurl?genre=book&isbn=978-90-481-2516-6",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4899-7454-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-662-53785-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-51118-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-57589-6",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4419-1120-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-23026-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-44738-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-05699-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-47831-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-31791-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-54083-7",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4612-1844-9",
"http://link.springer.com/openurl?genre=book&isbn=978-1-84800-070-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-19864-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-61088-7",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-46162-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-33916-0",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-32862-1",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-30250-3",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4939-1194-3",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4613-0139-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-54064-1",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-7116-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-43341-7",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4419-0641-0",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4419-5653-8",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-12682-1",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4471-7307-6",
"http://link.springer.com/openurl?genre=book&isbn=978-3-662-53045-0",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-33143-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-31089-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-12742-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-52250-0",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4471-5134-0",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-28887-1",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4419-9504-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-662-45171-7",
"http://link.springer.com/openurl?genre=book&isbn=978-3-8349-6331-4",
"http://link.springer.com/openurl?genre=book&isbn=978-1-84882-935-0",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-07806-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-14142-8",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-37314-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-20951-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-50091-1",
"http://link.springer.com/openurl?genre=book&isbn=978-3-540-77974-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-19596-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-662-53022-1",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4471-4474-8",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-54413-7",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-37902-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-46394-0",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4939-6374-4",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4612-4374-8",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-59731-7",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-22309-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-30319-7",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-32185-1",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-2212-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-662-49887-3",
"http://link.springer.com/openurl?genre=book&isbn=978-94-007-5757-8",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-14941-7",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4939-2122-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-58307-5",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-6271-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-21936-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-09351-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-21990-5",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-9170-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-55309-7",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4471-5201-9",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4939-2614-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-20451-2",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4612-4360-1",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-09171-6",
"http://link.springer.com/openurl?genre=book&isbn=978-94-007-1171-6",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-23012-2",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-4809-9",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4419-0925-1",
"http://link.springer.com/openurl?genre=book&isbn=978-3-658-07884-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-27265-8",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-57883-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-31650-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-01195-0",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-54349-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-662-43715-5",
"http://link.springer.com/openurl?genre=book&isbn=978-981-4560-67-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-23428-1",
"http://link.springer.com/openurl?genre=book&isbn=978-94-007-1211-9",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-27104-0",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-55444-0",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-63913-0",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-44561-8",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-34132-8",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-3954-7",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-29854-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-55615-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-46407-7",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4419-9982-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-53919-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-24551-5",
"http://link.springer.com/openurl?genre=book&isbn=978-981-10-1802-2",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4471-6419-7",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4939-6572-4",
"http://link.springer.com/openurl?genre=book&isbn=978-1-84800-322-4",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-6940-7",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4612-0979-9",
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"http://link.springer.com/openurl?genre=book&isbn=978-3-319-29716-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-04101-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-24346-7",
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"http://link.springer.com/openurl?genre=book&isbn=978-3-540-76504-2",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-7630-6",
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"http://link.springer.com/openurl?genre=book&isbn=978-3-319-62872-1",
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"http://link.springer.com/openurl?genre=book&isbn=978-3-319-54398-7",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-15018-5",
"http://link.springer.com/openurl?genre=book&isbn=978-94-017-8771-0",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4939-2113-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-22951-5",
"http://link.springer.com/openurl?genre=book&isbn=978-4-431-54526-2",
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"http://link.springer.com/openurl?genre=book&isbn=978-3-319-00894-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-44048-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-12493-3",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-9236-8",
"http://link.springer.com/openurl?genre=book&isbn=978-981-287-212-8",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-28980-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-29791-0",
"http://link.springer.com/openurl?genre=book&isbn=978-1-84628-642-1",
"http://link.springer.com/openurl?genre=book&isbn=978-3-642-20059-5",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-51412-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-20600-4",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-19425-7",
"http://link.springer.com/openurl?genre=book&isbn=978-3-662-54817-2",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-44127-6",
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"http://link.springer.com/openurl?genre=book&isbn=978-3-319-24331-3",
"http://link.springer.com/openurl?genre=book&isbn=978-3-319-50651-7",
"http://link.springer.com/openurl?genre=book&isbn=978-3-662-54486-0",
"http://link.springer.com/openurl?genre=book&isbn=978-1-4614-3987-5",
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