Directory.Delete sync or not ?

@sybaris commented on [Mon Sep 02 2019](https://github.com/dotnet/dotnet-api-docs.fr-fr/issues/10)

Hi,

The documentation does not specify if this method is synchronous or asynchronous.
When I run the example of this page, the display is "top-level directory exists: FALSE"
I have took the same code, but I create instead 100 files of with 100 000 lines of text (See code below).
And now the display is is "top-level directory exists: TRUE"

Bug or something missing in doc ?
If Directory.Delete must be sync for me it's a bug.
If Directory.Delete is async, this page has to be updated...

Regards,
Sybaris
PS1 : Framework 4.6.1
PS2 : Here the code

static void Main(string[] args)
{

string topPath = @"C:\NewDirectory";
string subPath = @"C:\NewDirectory\NewSubDirectory";

try
{
Directory.CreateDirectory(subPath);

for (int j = 0; j < 100; j++)
using (StreamWriter writer = File.CreateText(subPath + @"\example"+j+".txt"))
{
writer.WriteLine("content added");
for (int i = 0; i < 100000; i++)
{
writer.WriteLine("content added");

}
}

Directory.Delete(topPath, true);

bool directoryExists = Directory.Exists(topPath);

Console.WriteLine("top-level directory exists: " + directoryExists);
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.Message);
}

Console.WriteLine("Press a key to finish");
Console.ReadKey();
}

---
#### Détails du document

⚠ *Ne pas modifier cette section. C’est obligatoire pour docs.microsoft.com ➟ Liaison des problèmes GitHub.*

* ID: fa911a39-d442-3628-1138-98f77525ea6b
* Version Independent ID: 8a3c8131-0199-2d18-e90e-774eaf50a218
* Content: [Directory.Delete Method (System.IO)](https://docs.microsoft.com/fr-fr/dotnet/api/system.io.directory.delete?view=netframework-4.8#feedback)
* Content Source: [xml/System.IO/Directory.xml](https://github.com/dotnet/dotnet-api-docs.fr-fr/blob/live/xml/System.IO/Directory.xml)
* Product: **dotnet-api**
* Technology: **system.io**
* GitHub Login: @dotnet-bot
* Microsoft Alias: **dotnetcontent**

---

@srvbpigh commented on [Mon Sep 02 2019](https://github.com/dotnet/dotnet-api-docs.fr-fr/issues/10#issuecomment-527144752)

Hello, @sybaris

Thank you for your feedback.

We are actively reviewing your comments and will get back to you soon.

Kind regards,
Microsoft DOCS International Team