Common.cs

using Microsoft.Azure.Storage;
using Microsoft.Extensions.Configuration;
using System;
using System.IO;
using System.Runtime.CompilerServices;

namespace QueueStorage
{
    public class Common
    {
        internal static string ConnStr { get; private set; }

        /// <summary>
        /// Loads the connection string from the appsettings.
        /// </summary>
        static Common()
        {
            var builder = new ConfigurationBuilder()

             .SetBasePath(Directory.GetCurrentDirectory())
             .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

            var cfgRoot = builder.Build();

            ConnStr = cfgRoot["ConnectionString"];
        }


        /// <summary>
        /// Validate the connection string information in app.config and throws an exception if it looks like 
        /// the user hasn't updated this to valid values. 
        /// </summary>
        /// <param name="storageConnectionString">The storage connection string</param>
        /// <returns>CloudStorageAccount object</returns>
        public static CloudStorageAccount CreateStorageAccountFromConnectionString(string storageConnectionString)
        {
            CloudStorageAccount storageAccount;
            try
            {
                storageAccount = CloudStorageAccount.Parse(storageConnectionString);
            }
            catch (FormatException)
            {
                Console.WriteLine("Invalid storage account information provided. Please confirm the AccountName and AccountKey are valid in the app.config file - then restart the sample.");
                Console.ReadLine();
                throw;
            }
            catch (ArgumentException)
            {
                Console.WriteLine("Invalid storage account information provided. Please confirm the AccountName and AccountKey are valid in the app.config file - then restart the sample.");
                Console.ReadLine();
                throw;
            }

            return storageAccount;
        }

        public static void WriteException(Exception ex)
        {
            Console.WriteLine("Exception thrown. {0}, msg = {1}", ex.Source, ex.Message);
        }

    }
}