github.csx

using Octokit;

public GitHubClient Create(string productHeaderValue)
{
    var client = new GitHubClient(new ProductHeaderValue(productHeaderValue));

    return client;
}

main.csx

#load github.csx

var client = Create("gist-265ee01c76597cdf281b");
var eventsTask = client.Activity.Events.GetAllUserPerformed("ryanrousseau");
var events = eventsTask.Result;

foreach (var userEvent in events)
{
	Console.WriteLine(userEvent.Type);
}

scriptcs_packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Octokit" version="0.16.0" targetFramework="net45" />
</packages>