gistfile1.txt

using System;
using Microsoft.Azure.Documents;
using System.Threading.Tasks;
using Microsoft.Azure.Documents.Client;

namespace StackOverflow.NetCore
{
    class Program
    {
        private static IDocumentClient client = new Microsoft.Azure.Documents.Client.DocumentClient(new Uri("https://myaccount.documents.azure.com"), "accountkey==");
        private static string _databaseId = "digivate_clients_0_blogging";

        static void Main(string[] args)
        {
            CreateDatabaseIfNotExistsAsync().GetAwaiter().GetResult();
            Console.ReadLine();
        }

        public static async Task CreateDatabaseIfNotExistsAsync()
        {
            try
            {
                await client.ReadDatabaseAsync(UriFactory.CreateDatabaseUri(_databaseId));
            }
            catch (DocumentClientException e)
            {
                if (e.StatusCode == System.Net.HttpStatusCode.NotFound)
                {
                    await client.CreateDatabaseAsync(new Database { Id = _databaseId }); // Throws Not Found Here!
                }
                else
                {
                    Console.Write(e.StatusCode);
                    Console.ReadKey();
                }
            }
        }
    }
}