octokit.net/Octokit/Helpers/WebHookConfigComparer.cs

using System.Collections.Generic;

namespace Octokit
{
    public class WebHookConfigComparer : IEqualityComparer<KeyValuePair<string, string>>
    {
        public bool Equals(KeyValuePair<string, string> x, KeyValuePair<string, string> y)
        {
            return x.Key == y.Key;
        }

        public int GetHashCode(KeyValuePair<string, string> obj)
        {
            return obj.Key.GetHashCode();
        }
    }
}