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If running into a problem where you have multiple areas registered in an MVC ASP.NET Framework app, and you're trying to port this to ASP.NET Core MVC (using System Web Adapters and/or YARP), you may find that while the application with a single area works, multiple areas do not work (only the first area registration works).

The fix is to update your MapReverseProxy line to the following:

app.MapReverseProxy()
   .Add(static builder => ((RouteEndpointBuilder)builder).Order = int.MaxValue);

Or, if you're using MapForwarder:

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if (args.Length == 3)
{
    Play(args.Select(int.Parse).ToArray());
}
else
{
    Console.WriteLine("Usage: Minesweeper width height mineCount (e.g. Minesweeper 12 6 6)");
}

static void Play(params int[] args)

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# one time setup
Install-Module PsRedis

# connect
Import-Module PsRedis
Connect-Redis -ConnectionString "my-redis-server.example.com"

# create function, given a redis key, get the bytes, ungzip/deflate them and return the string.
function Get-RedisKeyAndUncompress($key) {
    # get ambient connection

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A collection of questions and mental models the pros use when debugging

1. What question can you ask that will eliminate half the possible answers? Ask that first.
   • Ask broad questions before asking specific ones. For example ask “have you checked the logs?” Before asking “have you checked the dev tools console log?”
2. Have you checked the logs?
   • Application Logs
   • System Logs
   • Web Server Logs
   • Database Logs

• Browser Dev Tools Console/Network Tabs

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MSBuild

• MSBuild is a build system.
• Given files and commands, it tries to do the "minimal amount of work"
• You can execute csproj files by running msbuild (from your Developer terminal)

Three main parts to a csproj

• PropertyGroup - Defines variables

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using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace ThreadPoolLogger
{
    class Program
    {
        const int ThreadChange = 40;

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using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Diagnostics.Windows.Configs;
using BenchmarkDotNet.Running;
using System;
using System.Linq;
using System.Text.RegularExpressions;

// Benchmark Results:
// 
// BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19041.329 (2004/?/20H1)

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using System;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;

namespace AsyncPatterns
{
    public class Program
    {
        public static async Task Main(string[] args)

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using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace AsyncLocalPlayground
{
    class Program
    {
        //private static string ThreadId; // too wide! per AppDomain

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// 
// C# 8 port of F# brace matching.
//
using System;
using System.Linq;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace BraceMatching
{
    using ParseState = Nullable<int>; // we get to cheat a bit because the C# compiler will "map" over nullable types implicitly