octokit.net list off contributors who have had a pull requests merged into a repository

list-pull-request-contributors.linq

var client = new GitHubClient(new Octokit.ProductHeaderValue("NDC-Oslo"))
{
    Credentials = new Credentials("some-username", "some-password")
};

// find all merged PRs
var filter = new PullRequestRequest() { State = ItemState.Closed };

var pullRequests = await client.Repository.PullRequest.GetForRepository("octokit", "octokit.net", filter);
Console.WriteLine("Pull Requests: " + pullRequests.Count);

var contributors = pullRequests.Where(x => x.MergedAt.HasValue)
                               .GroupBy(x => x.User.Login)
                        .Select(x => new { Key = x.Key, Count = x.Count() })
						.OrderByDescending(x => x.Count);
Console.WriteLine("Contributors: " + contributors.Count());
Console.WriteLine();

foreach(var contributor in contributors)
{
   Console.WriteLine("{0} has {1} merged PRs", contributor.Key, contributor.Count);
}