gistfile1.cs

public static void insertWords(List<string> words)
{
    var context = new OperationDataContext();
    
    var existingWords = context.GetTable<english_dictionary>().Where(word => words.Contains(word)).ToList();
    
    var wordsToInsert = words.Except(existingWords).ToList();
    
    foreach (var word in wordsToInsert)
    {
        var dictionary = new english_dictionary { word = word.Trim() };
        
        context.english_dictionaries.InsertOnSubmit(dictionary);
    }
    
    context.SubmitChanges();

    Console.WriteLine("Database insert operations complete.");
}