Azure Logging to Cosmos DB

Logger.cs

using System.IO;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Azure.WebJobs.Host;
using Newtonsoft.Json;
using System.Threading.Tasks;

namespace Logger
{
    public static class HttpTrigger
    {
        [FunctionName("HttpTrigger")]
        public static async Task<IActionResult> Run([HttpTrigger(AuthorizationLevel.Function, "post", Route = null)]HttpRequest req, TraceWriter log)
        {
            log.Info("C# HTTP trigger function processed a request.");

            string requestBody = new StreamReader(req.Body).ReadToEnd();
			var logThis = JsonConvert.DeserializeObject<Log>(requestBody);

			await new Logger().Add(logThis);

			return (ActionResult)new OkResult();
        }
    }
}


// Add to the Log on Cosmos DB

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.Azure.Documents.Client;
using Newtonsoft.Json;

namespace Logger
{
	public sealed class Logger
	{
		readonly Uri Uri = new Uri(""); //Cosmos DB Url
		const string PrimaryKey = "";   // Primary key to access Cosmos DB
		readonly DocumentClient client;

		public Logger()
		{
			client = new DocumentClient(Uri, PrimaryKey);
		}

		public async Task Add(Log log)
		{
			if (log == null)
				throw new ArgumentNullException(nameof(log));

			await client.CreateDocumentAsync(DocumentURI, log);
		}

		Uri DocumentURI
		{
			get => UriFactory.CreateDocumentCollectionUri("Log", "Log");
		}

	}

	public sealed class Log
	{
		public DateTime Time { get; set; }
		public string DeviceID { get; set; }
		public string Level { get; set; }
		public string SourceFile { get; set; }
		public int LineNumber { get; set; }
		public string Column { get; set; }
		public string FunctionName { get; set; }
		public string Message { get; set; }

		public override string ToString()
		{
			return JsonConvert.SerializeObject(this);
		}
	}
}