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using System;
using System.Diagnostics;
using System.Linq;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace Infrastructure
{
    public sealed class DiscriminatedJsonConverter : JsonConverter
    {

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public static class QueryableExtensions
    {
        public static IQueryable<T> Filter<T>(this IQueryable<T> queryable, IEnumerable<KeyValuePair<string, string>> filters) where T : class
        {
            foreach (var filter in filters)
            {
                var propertyName = typeof(T).GetProperties().Select(x => x.Name).SingleOrDefault(x => x.ToLower() == filter.Key.ToLower());
                if (propertyName.IsNullOrWhiteSpace()) continue;
                var parameterExpression = Expression.Parameter(typeof(T));
                var propertyExpression = Expression.Property(parameterExpression, propertyName);

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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading;

namespace MihaZupan
{
    /// <summary>
    /// A simple request scheduler to help you conform to rate limiting
    /// </summary>

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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;

namespace MihaZupan
{
    // Block the caller of WaitOne as long as necesarry
    public class RequestScheduler

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public class CustomDbContext : DbContext
{
    // ...
    
    protected override void OnConfiguring(DbContextOptionsBuilder options)
    {
        // Replace default materializer source to custom, to convert DateTimes
        options.ReplaceService<IEntityMaterializerSource, DateTimeKindEntityMaterializerSource>();

        base.OnConfiguring(options);

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Ansible playbook to setup HTTPS using Let's encrypt on nginx.

The Ansible playbook installs everything needed to serve static files from a nginx server over HTTPS.
The server pass A rating on [SSL Labs](https://www.ssllabs.com/).

To use:
 1. Install [Ansible](https://www.ansible.com/)
 2. Setup an Ubuntu 16.04 server accessible over ssh
 3. Create `/etc/ansible/hosts` according to template below and change example.com to your domain
 4. Copy the rest of the files to an empty directory (`playbook.yml` in the root of that folder and the rest in the `templates` subfolder)

tuscen

using System;
using System.Collections.Generic;
using System.Linq;
using Hangfire.Common;
using Hangfire.States;
using Hangfire.Storage;

namespace Hangfire.Pro
{
    /// <summary>

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public class DisableMultipleQueuedItemsFilter : JobFilterAttribute, IClientFilter, IServerFilter
{
    private static readonly TimeSpan LockTimeout = TimeSpan.FromSeconds(5);
    private static readonly TimeSpan FingerprintTimeout = TimeSpan.FromHours(1);

    public void OnCreating(CreatingContext filterContext)
    {
        if (!AddFingerprintIfNotExists(filterContext.Connection, filterContext.Job))
        {
            filterContext.Canceled = true;

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# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

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The Task-based Asynchronous Pattern

Stephen Toub, Microsoft February 2012 Original

Contents

• Overview
• The Task-based Asynchronous Pattern Defined