// Arrange
var container = new Container();

container.Register<ICommand, ConcreteCommand>(new AsyncScopedLifestyle());
container.Register<IDBContext, ConcreteDbContext>(new AsyncScopedLifestyle("dbContext"));

using (AsyncScopedLifestyle.BeginScope(container))
{
    // Act
    var iCommandInstance1 = container.GetInstance<ICommand>();
    IDBContext iDbContextInstance1 = null;
    IDBContext iDbContextInstance2 = null;

    using (AsyncScopedLifestyle.BeginScope(container, "dbContext"))
    {
        var iCommandInstance2 = container.GetInstance<ICommand>();
        iDbContextInstance1 = container.GetInstance<IDBContext>();

        // Assert
        Assert.IsTrue(object.ReferenceEquals(iCommandInstance1, iCommandInstance2));
    }

    using (AsyncScopedLifestyle.BeginScope(container, "dbContext"))
    {
        var iCommandInstance3 = container.GetInstance<ICommand>();
        iDbContextInstance2 = container.GetInstance<IDBContext>();

        // Assert
        Assert.IsTrue(object.ReferenceEquals(iCommandInstance1, iCommandInstance3));
    }

    Assert.IsFalse(object.ReferenceEquals(iDbContextInstance1, iDbContextInstance2));
}