proof | C# Online Compiler

proof by GuRuStron

using System;
using System.Threading.Tasks;

var task = new Task(async () =>
{
    await Task.Delay(500);
    Console.WriteLine("after delay");
});
task.Start();
await Task.WhenAll(task);
Console.WriteLine("after when all");
await Task.Delay(500);

​x
 
using System;
using System.Threading.Tasks;
​
var task = new Task(async () =>
{
    await Task.Delay(500);
    Console.WriteLine("after delay");
});
task.Start();
await Task.WhenAll(task);
Console.WriteLine("after when all");
await Task.Delay(500);

Json.NET version: Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed

Original JSON:
[
  {
    "type": "06A, 06B, 06C, 06D, 06E",
    "qt": "6-8-",
    "id": "06A, 06B, 06C, 06D, 06E6-8-"
  },
  {
    "type": "06A",
    "qt": "6-8-",
    "id": "06A"
  }
]

Filtered and re-serialized JSON:
[
  {
    "type": "06A",
    "qt": "6-8-",
    "id": "06A"
  }
]

Cached Result
Last Run:	12:23:49 am
Compile:	0.362s
Execute:	0.206s
Memory:	1.05Mb
CPU:	0.188s

View IL Code