Note:
This documentation is for version 2.2.0 of the library.
Some samples may not work with other versions.
Installation
Install the Google.Cloud.Translate.V3 package from NuGet. Add it to
your project in the normal way (for example by right-clicking on the
project in Visual Studio and choosing "Manage NuGet Packages...").
Authentication
When running on Google Cloud Platform, no action needs to be taken to authenticate.
Otherwise, the simplest way of authenticating your API calls is to
download a service account JSON file then set the GOOGLE_APPLICATION_CREDENTIALS environment variable to refer to it.
The credentials will automatically be used to authenticate. See the Getting Started With
Authentication guide for more details.
Create a client instance by calling the static Create or CreateAsync methods. Alternatively,
use the builder class associated with each client class (e.g. TranslationServiceClientBuilder for TranslationServiceClient)
as an easy way of specifying custom credentials, settings, or a custom endpoint. Clients are thread-safe,
and we recommend using a single instance across your entire application unless you have a particular need
to configure multiple client objects separately.
Sample code
TranslationServiceClient client = TranslationServiceClient.Create();
TranslateTextRequest request = new TranslateTextRequest
{
Contents = { "It is raining." },
TargetLanguageCode = "fr-FR",
Parent = new ProjectName(projectId).ToString()
};
TranslateTextResponse response = client.TranslateText(request);
// response.Translations will have one entry, because request.Contents has one entry.
Translation translation = response.Translations[0];
Console.WriteLine($"Detected language: {translation.DetectedLanguageCode}");
Console.WriteLine($"Translated text: {translation.TranslatedText}");
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThe \u003ccode\u003eGoogle.Cloud.Translate.V3\u003c/code\u003e library is a .NET client for the Google Cloud Translation API, with the current documentation focused on version 2.2.0.\u003c/p\u003e\n"],["\u003cp\u003eThe latest available version of the library is 3.9.0, with various earlier versions like 3.8.0 and 3.7.0 also listed, all accessible through their respective links.\u003c/p\u003e\n"],["\u003cp\u003eInstallation of the library is done through NuGet by managing packages in Visual Studio, allowing you to add \u003ccode\u003eGoogle.Cloud.Translate.V3\u003c/code\u003e to your .NET project.\u003c/p\u003e\n"],["\u003cp\u003eAuthentication on Google Cloud Platform requires no extra steps, while external use requires a service account JSON file and the \u003ccode\u003eGOOGLE_APPLICATION_CREDENTIALS\u003c/code\u003e environment variable to be set.\u003c/p\u003e\n"],["\u003cp\u003eAll operations use the \u003ccode\u003eTranslationServiceClient\u003c/code\u003e, which can be created using the \u003ccode\u003eCreate\u003c/code\u003e or \u003ccode\u003eCreateAsync\u003c/code\u003e methods and should be reused throughout the application.\u003c/p\u003e\n"]]],[],null,[]]