Problems with HtmlAgilityPack

A dictionary of tables by name will be returned. The first column in each table serves as the key and the second column serves as the value.

var tables = new Dictionary<string, Dictionary<string, string>>();
var doc = new HtmlDocument();
doc.Load(@"D:\(тут путь к файлу)\1.htm", Encoding.GetEncoding(1251), false);
var tableNames = doc.DocumentNode.SelectNodes("//td[@class='pt']/a").Select(a=>a.Attributes["name"].Value);
foreach(string name in tableNames)
{
    var table = doc.DocumentNode.SelectSingleNode("//table[.//a[@name='" + name + "']]/following-sibling::table[1]");
    int columns = table.SelectNodes(".//tr[1]/td").Count();

    string[] keys = table.SelectNodes(".//tr/td["+(columns-1)+"]").Select(n => n.InnerText.Replace("&nbsp;"," ").Trim()).ToArray();
    string[] values = table.SelectNodes(".//tr/td["+columns+"]").Select(n => n.InnerText.Replace("&nbsp;"," ").Trim()).ToArray();
    var body = new Dictionary<string, string>();
    for (int i = 0; i < keys.Count(); i++)
    {
        string key = keys[i];
        if (body.ContainsKey(key))
            body[key] += ", " + values[i];
        else if( key!="" && values[i]!="")
            body[key] = values[i];

    }
    tables.Add(name, body);

}

For instancetables["power management"] a list of 4 entries

• [0] {[Текущий источник питания, Электросеть]} System.Collections.Generic.KeyValuePair
• [1] {[Состояние батарей, Нет батареи]} System.Collections.Generic.KeyValuePair
• [2] {[Полное время работы от батарей, Неизвестно]} System.Collections.Generic.KeyValuePair
• [3] {[Оставшееся время работы от батарей, Неизвестно]} System.Collections.Generic.KeyValuePair

and tables["power management"]["Текущий источник питания"] returns:

"Электросеть"

In order to iterate, you can:

foreach(var tableName in tables.Keys)
{
    var table = tables[tableName];
    foreach(var key in table.Keys)
    {
        string value = table[key];
        Debug.Print(tableName + "/" + key + "/" + value);
    }
}