Unlocking the Power of Google Calendar API with C#

In today’s tech-driven world, automation and integration play a crucial role in enhancing productivity. One powerful tool that many businesses rely on for scheduling and collaboration is Google Calendar. In this blog post, we’ll explore how to harness the capabilities of the Google Calendar API using C# code. By the end of this guide, you’ll have a simple yet effective program that retrieves information from a Google Calendar account.

Google Calendar API with C#

Setting the Stage:

To get started, we’ll need a few prerequisites. Make sure you have a Google Cloud Platform (GCP) project set up and the necessary credentials. In this example, we are using a service account for authentication, so ensure that you have the service account key file (in JSON format) ready.

Google Calendar API

We will need these libraries

using Google.Apis.Auth.OAuth2;
using Google.Apis.Calendar.v3;
using Google.Apis.Services;

Quick and easy Authentication and Initialization

Next, we specify the required scopes and set up the authentication using the service account credentials. Replace "[REDACTED]" with the email address of the user you want to impersonate.

string[] Scopes = { CalendarService.Scope.Calendar };
GoogleCredential credential;

const string workspaceAdmin = "[REDACTED]";
const string credentials = @"C:\\workspaceserviceaccount.json";

credential = GoogleCredential.FromFile(credentials).CreateScoped(Scopes).CreateWithUser(workspaceAdmin);

Creating the Calendar Service:

Now, we’ll create an instance of the CalendarService using the authenticated credential.

var services = new CalendarService(new BaseClientService.Initializer()
    HttpClientInitializer = credential,

Fetching Calendar Information

With the service in place, we can now retrieve information about the primary calendar. The following code fetches details about the primary calendar and prints its ID to the console.

var results = services.Calendars.Get("primary").Execute();


Congratulations! You’ve successfully set up a C# program to interact with the Google Calendar API. This basic example lays the foundation for more advanced features and functionalities. As you delve deeper into the Google Calendar API documentation, you’ll discover the potential to create, update, and delete events, manage calendar settings, and much more. This integration can be a game-changer for applications that require seamless calendar synchronization and event management. Explore the possibilities and enhance your applications with the power of Google Calendar integration

About Linda Lawton

My name is Linda Lawton I have more than 20 years experience working as an application developer and a database expert. I have also been working with Google APIs since 2012 and I have been contributing to the Google .Net client library since 2013. In 2013 I became a a Google Developer Experts for Google Analytics.

Leave a comment

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.