Documentation can be found at documentation site

T this library supports reading multiple contacts from a single vcf file, a stream or a contact string and returns the contact objects in a List. The library currently supports only vCard version 2.1 and 3.0 (a curated list of properties supported can be seen on the documentation site).

First get this package from nuget via your package manager:

Install-Package vCardLib.dll

or

dotnet add package vCardLib.dll

Import the namespaces:

using vCardLib.Deserializers;

In your class you call the static method 'FromFile' and pass a string containing a path to it:

string filePath = //path to vcf file;

var contacts = Deserializer.FromFile(filePath);

Or read your contacts from a Stream:

var stream = //generate a stream somehow;
var contacts = Deserializer.FromStream(stream);

Or read your contacts from a string:

var contactDetails = @"BEGIN:VCARD
N:John;Doe;;;
END:VCARD";
var contacts = Deserializer.FromString(contactDetails);

Iterate over the contact collection and pick the vCard objects:

foreach(var contact in contacts)
{
  Console.WriteLine(contact.FormattedName);
}

complete documentation on github.io