New Public Gist

main.cs

using System.Linq;
using ServiceStack;
using ServiceStack.Text;

public class GithubRepository
{
    public string Name { get; set; }
    public string Description { get; set; }
    public string Url { get; set; }
    public string Homepage { get; set; }
    public string Language { get; set; }
    public int Watchers { get; set; }
    public int Forks { get; set; }

    public override string ToString() => Name;
}

var orgName = "ServiceStack";

//https://githubengineering.com/crypto-removal-notice/
System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;

var orgRepos = $"https://api.github.com/orgs/{orgName}/repos"
    .GetJsonFromUrl(httpReq => httpReq.UserAgent = "Gistlyn")
    .FromJson<GithubRepository[]>()
    .OrderByDescending(x => x.Watchers)
    .Take(5)
    .ToList();

"Top 5 {0} Github Repositories:".Print(orgName);
orgRepos.PrintDump();

// Save a copy of this *public* Gist by clicking the "Save As" below 

packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="System.Memory" version="4.5.4" targetFramework="net45" />
  <package id="ServiceStack.Text" version="5.10.0" targetFramework="net45" />
  <package id="ServiceStack.Client" version="5.10.0" targetFramework="net45" />
  <package id="ServiceStack.Common" version="5.10.0" targetFramework="net45" />
  <package id="ServiceStack.Interfaces" version="5.10.0" targetFramework="net45" />
</packages>