var translator = new GoogleTranslator();

Language from = Language.Auto;
Language to = GoogleTranslator.GetLanguageByName("Japanese");

TranslateResult result = await translator.TranslateLiteAsync("Hello. How are you?", from, to);

//The result is separated by the suggestions and the '\n' symbols
string[] resultSeparated = result.FragmentedTranslation;

//You can get all text using MergedTranslation property
string resultMerged = result.MergedTranslation;

//There is also original text transcription
string transcription = result.TranslatedTextTranscription; // Kon'nichiwa! Ogenkidesuka?

Language detectedLanguage = result.SourceLanguage;
Console.WriteLine(detectedLanguage.FullName);
// English
Console.WriteLine("Confidence: " + result.Corrections.Confidence); // number from 0 to 1

Language spanish = new Language("Spanish", "es"); // For the method, only the second parameter is important (ISO639)

var result2 = await translator.TranslateLiteAsync("world", spanish, GoogleTranslator.GetLanguageByName("Russian"));

if(result2.Corrections.LanguageWasCorrected) // true
  Console.WriteLine($"The source language has been changed to {result2.Corrections.CorrectedLanguage.FullName}");

Console.WriteLine(result2.MergedTranslation) // мир

string misspellingsText = "The quik brown fox jumps ovver the lazy dog"
var english = new Language("English language", "en");
Console.WriteLine(GoogleTranslator.IsLanguageSupported(english)); // true
var result3 = await translator.TranslateLiteAsync(misspellingsText, english, GoogleTranslator.GetLanguageByISO("ru"));

if(result3.Corrections.TextWasCorrected)
  foreach(string correctedWord in result3.Corrections.CorrectedWords)
    Console.WriteLine(correctedWord + " "); // "quick", "over"

Console.WriteLine(result3.MergedTranslation) // "Быстрая коричневая лиса прыгает через ленивую собаку"

GoogleTranslator translator = new GoogleTranslator();

var result4 = await translator.TranslateAsync(
  "книга", GoogleTranslator.GetLanguageByName("Russian"), GoogleTranslator.GetLanguageByName("English"));

if(result.ExtraTranslations != null)
  Console.WriteLine(result.ExtraTranslations.ToString()); // ToString returns friendly for reading string
  

foreach(ExtraTranslation item in result4.ExtraTranslations)
  Console.WriteLine($"{item.Phrase}: {String.Join(", ", item.PhraseTranslations)}); 
  // just like item.ToString()

var proxy = new WebProxy(uri); // You also can use GoogleTranslateFreeApi.Proxy class for this
translator.Proxy = proxy;