using Microsoft.Extensions.DependencyInjection;

using System.Diagnostics;

using System;

using System.Threading;

using System.Threading.Tasks;

​

​

var serviceCollection = new ServiceCollection();

serviceCollection.AddScoped<ScopedVariables>();

serviceCollection.AddSingleton<AsyncLocalVariables>();

​

var serviceProvider = serviceCollection.BuildServiceProvider();

​

var scopedVariables0 = serviceProvider.GetRequiredService<ScopedVariables>();

var asyncVariables0 = serviceProvider.GetRequiredService<AsyncLocalVariables>();

​

scopedVariables0.OrganizationId = new Guid("11111111-1111-1111-1111-111111111111");

asyncVariables0.OrganizationId = new Guid("11111111-1111-1111-1111-111111111111");

​

using (var scope = serviceProvider.CreateScope())

{

    var scopedVariables1 = scope.ServiceProvider.GetRequiredService<ScopedVariables>();

​

    // A place to manually copy the values from scopedVariables0 to scopedVariables1

    // It should be done for every new scope

    scopedVariables1.OrganizationId = scopedVariables0.OrganizationId;

​

    Debug.Assert(scopedVariables1.OrganizationId == scopedVariables0.OrganizationId);

​

    var asyncVariables1 = scope.ServiceProvider.GetRequiredService<AsyncLocalVariables>();

​

    // no need to copy the values from asyncVariables0 to asyncVariables1

    Debug.Assert(asyncVariables1.OrganizationId == new Guid("11111111-1111-1111-1111-111111111111"));

​

    await ChangeVariable();

​

    Debug.Assert(asyncVariables1.OrganizationId == new Guid("11111111-1111-1111-1111-111111111111"));

​

    Console.WriteLine();

​

    return;

​

    async Task ChangeVariable()

    {

        var asyncVariables2 = serviceProvider.GetRequiredService<AsyncLocalVariables>();

        asyncVariables2.OrganizationId = new Guid("22222222-2222-2222-2222-222222222222");

​

        Debug.Assert(asyncVariables0.OrganizationId == new Guid("22222222-2222-2222-2222-222222222222"));

        Debug.Assert(asyncVariables1.OrganizationId == new Guid("22222222-2222-2222-2222-222222222222"));

​

        await Task.Yield();

    }

}

​

​

class ScopedVariables

{

    public Guid? OrganizationId { get; set; }

}

​

class AsyncLocalVariables

{

    private static readonly AsyncLocal<Guid?> Organization = new();

​

    public Guid? OrganizationId

    {

        get => Organization.Value;

        set => Organization.Value = value;

    }

}