CardDAV for .NET

A .NET Standard 2.0 library to work with CardDAV servers.

Features

• Connection Management: Connect to CardDAV by respecting redirects and .well-known/carddav information.
• Principal Discovery: Discover the principal URL for a user.
• Address Book Management: Create, list and delete address books.
• Contact Management: Create, list, update and delete contacts.
• vCard Support: Support for vCard format (RFC 6350) for contact data provided by vCard.Net.

Usage

using AMWD.Protocols.CardDAV;

using var client = new CardDavClient("https://your.carddav.host", "username", "P@ssw0rd!");
bool isInitialized = await client.InitializeAsync();
if (!isInitialized)
{
	Console.WriteLine("Failed to initialize CardDAV client.");
	return;
}

var addressBooks = await client.GetAddressBooksAsync();
foreach (var addressBook in addressBooks)
{
	Console.WriteLine($"Address Book: {addressBook.DisplayName} ({addressBook.Url})");
}

Supported CardDAV Servers

The support might be limited as some providers do not allow creating/deleting new address books.
Also the authentication is limited to Basic Authentication.

Apple iCloud

• Base URL: https://contacts.icloud.com/
• Username: your-apple-id@icloud.com
• Password: your-app-specific-password

Google Calendar

• Base URL: https://www.googleapis.com/.well-known/carddav
• Username: your-email-address@gmail.com
• Password: your-app-specific-password

Nextcloud / ownCloud

• Base URL: https://nextcloud.your.server/remote.php/dav/
• Username: nextcloud-username
• Password: nextcloud-password

Radicale

• Base URL: http://radicale.local:5232/
• Username: radicale-username
• Password: radicale-password

OpenCloud (extended with Radicale)

• Base URL: https://opencloud.your.server/
• Username: opencloud-username
• Password: your-app-specific-token

I used sabre/dav as orientation for the implementation.

MIT License (see choose a license).