An very basic example of a Webhook in C# to Discord.

discordWebHook.cs

using Newtonsoft.Json;
using System.Collections.Generic;
using System.Net.Http;
using System.Text;

namespace discordWebHook
{
    class Program
    {
        private static HttpClient client;
        public static HttpClient Client {
            get {
                if (client == null)
                    client = new HttpClient();

                return client;
            }
        }

        static void Main(string[] args)
        {
            //https://discordapp.com/api/webhooks/123456789012345678/ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEF
            var WebHookId = "123456789012345678";
            var WebHookToken = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEF";

            const string Success = "https://cdn.shopify.com/s/files/1/0185/5092/products/persons-0041_large.png?v=1369543932";
            const string Cloud = "https://cdn.shopify.com/s/files/1/0185/5092/products/persons-0189_large.png?v=1369544011";
            const string Failure = "https://cdn.shopify.com/s/files/1/0185/5092/products/persons-0035_large.png?v=1369543848";
            const string Meh = "https://cdn.shopify.com/s/files/1/0185/5092/products/persons-0052_large.png?v=1369543755";
            const string Warning = "https://cdn.shopify.com/s/files/1/0185/5092/products/persons-0016_large.png?v=1369543588";


            const string colorBlue = "1F61E6";
            const string colorGreen = "80E61F";
            const string colorRed = "E7421F";
            const string colorPurple = "C61FE6";
            const string colorYellow = "E6C71F";

            var SuccessWebHook = new
            {
                username = "Text of the message",
                content = "This is the main content section",
                avatar_url = "https://cdn.shopify.com/s/files/1/0185/5092/products/persons-0041_large.png?v=1369543932",
                embeds = new List<object>
                {
                    new
                    {
                        title = "Embed",
                        url="https://www.google.com/search?q=something",
                        description="This is the description section of the Embed, the embed has a color bar to the left side",
                        color= int.Parse(colorGreen, System.Globalization.NumberStyles.HexNumber)
                    },

                    new
                    {
                        title = "Another Embed",
                        url="https://www.google.com/search?q=somethingElse",
                        description="This is the description section of the Embed, the embed has a color bar to the left side",
                        color= int.Parse(colorPurple, System.Globalization.NumberStyles.HexNumber)
                    }
                }
            };


            string EndPoint = string.Format("https://discordapp.com/api/webhooks/{0}/{1}", WebHookId, WebHookToken);

            var content = new StringContent(JsonConvert.SerializeObject(SuccessWebHook), Encoding.UTF8, "application/json");

            Client.PostAsync(EndPoint, content).Wait();
        }
    }
}

Thanks a lot, there is a way to attach files with the message ?

I haven't played around with this code in years, a quick stack overflow search yielded this https://stackoverflow.com/questions/62494644/how-to-send-file-attachment-with-embed-discord-net-webhook-c-sharp

I found out this solution, this one fits better to me especially for zipping the folder with the files before send to the channel.

public static void  GenerateFileForDiscord(string logFolderPath, string logFolderName)
{
            var WebHookId = "Insert your WebHook ID here";
            var WebHookToken = "Insert your WebHook Token here";
            MultipartFormDataContent logFolderZipped = new MultipartFormDataContent();
            var logFolderBytes = System.IO.File.ReadAllBytes(logFolderPath + ".zip");
            logFolderZipped.Add(new ByteArrayContent(logFolderBytes, 0, logFolderBytes.Length), logFolderName, logFolderName+".zip");
            string EndPoint = string.Format("https://discordapp.com/api/webhooks/{0}/{1}", WebHookId, WebHookToken);            
            Client.PostAsync(EndPoint, logFolderZipped).Wait();
}

That's pretty awesome, thanks for sharing. Hope your project is going well.