Delete External Contact

We sync our organisations employees list to the External Contacts list. We run a sync on a daily basis. When an employee leaves, I'm trying to delete the external contact entry of that employee. However, I'm having issues. When I have 3 or more leavers on the same day, I seem to be able to delete the first and second. Deletion of the third fails.

Here is the delete function I'm using. I'm calling it from the Sync function when a leaver is identified and needs deleting:

private Object DeleteContact(String AccessToken, string ContactId)
{
rtLog.Text += "Deleting Step 1" + Environment.NewLine;
string url = "https://api.euw2.pure.cloud/api/v2/externalcontacts/contacts/" + ContactId;
var httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
rtLog.Text += "Deleting Step 2" + Environment.NewLine;
httpWebRequest.Method = "DELETE";
httpWebRequest.ContentType = "application/json";
httpWebRequest.Headers.Add("Authorization", "Bearer " + AccessToken);
rtLog.Text += "Deleting Step 3" + Environment.NewLine;
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
rtLog.Text += "Deleting Step 4" + Environment.NewLine;
var result = new
{
StatusCode = httpResponse.StatusCode,
StatusDescription = httpResponse.StatusDescription
};

        rtLog.Text += "Deleting Step 5" + Environment.NewLine;

        return result;
    }

I've added some log comments to the code. When deleting the 1st and 2nd contact, the code runs though to step 5 and the contact is deleted. On the 3rd contact, the code gets as far as Step 3 and no further. No errors are returned. The code just stops at that stage.

Any help or guidance on this will be appreciated.

If your application is hanging and becoming unresponsive, I'd encourage you to seek support from the web request library you're using and employ general .NET troubleshooting methodologies to diagnose hanging applications.

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