xunit timing test

using System;
using System.Reflection;
using System.Threading;
using System.Threading.Tasks;
using Xunit;
using Xunit.Sdk;

namespace XUnitMany
{
    public class Class1
    {
        [Fact]

        public void Test11()
        {
            Console.WriteLine("P11B");
            Thread.Sleep(5000);
            Console.WriteLine("P11E");
        }

        [Fact]
        public void Test12()
        {
            Console.WriteLine("P12B");
            Thread.Sleep(5000);
            Console.WriteLine("P12E");
        }
    }

    public class Class2
    {
        public Class2()
        {
            Thread.Sleep(1000);
        }

        [Fact]
        public void Test21()
        {
            Console.WriteLine("P21B");
            Thread.Sleep(5000);
            Console.WriteLine("P21E");
        }

        [Fact]
        [SleepBeforeAndAfer]
        public void Test22()
        {
            Console.WriteLine("P22B");
            Thread.Sleep(5000);
            Console.WriteLine("P22E");
        }

        [Fact]
        [SleepBeforeAndAfer]
        public Task Test23()
        {
            Console.WriteLine("P22B");
            Thread.Sleep(5000);
            Console.WriteLine("P22E");
            return Task.Delay(1);
        }
    }

    public class SleepBeforeAndAfer : BeforeAfterTestAttribute
    {
        public override void Before(MethodInfo methodUnderTest)
        {
            Thread.Sleep(2000);
        }

        public override void After(MethodInfo methodUnderTest)
        {
            Thread.Sleep(2000);
        }
    }
}