Problem deleting a record using an ODATA webservice

LS,

In D365BC I created a simple table, card page and list page.

You can create a list of workers entering: first name, last name and function.
I turned the card page into a web service and now there is a ODATA V3, ODATA V4 and SOAP web service availabale. The web services are created automatically, so there cannot be an error in that part.

 

In C# VS2019 I created a program to see if I can delete a record using these web services.

When I use the SOAP webservice, there is no problem. It deletes the selected record.

 

private void button4_Click(object sender, EventArgs e)
{//delete
   string _wsURL = "https://api.businesscentral.dynamics.com/v2.0/SomeFunkyGUID/Sandbox/WS/CRONUS%20NL/Page/WorkersWS";
   string _userName = "UserName";
   string _wsKey = "Password";

   //Create an instance of the D365BC SOAP WS
   BasicHttpBinding _binding = new BasicHttpBinding();

   //Set https usage
   _binding.Security.Mode = BasicHttpSecurityMode.Transport;
   _binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Basic;

   WorkersWS_PortClient _ws = new WorkersWS_PortClient(_binding, new EndpointAddress(_wsURL));
   _ws.ClientCredentials.UserName.UserName = _userName;
   _ws.ClientCredentials.UserName.Password = _wsKey;

   try
   {
      _ws.Delete(rtbE_Tag.Text); //this textbox holds this: W/ABC12345 nr which is like a primary key
   }
   catch (Exception _ex)
   {

   }
} 

 

 

But now I do almost the same, except that I now use the ODATA web service (PS there is no difference if I use the ODATA v3 or v4):

 

private async void button6_Click(object sender, EventArgs e)
{
   try
   {
      string _url = "https://api.businesscentral.dynamics.com/v2.0/SomeFunkyGuid/Sandbox/ODataV4/Company('CRONUS%20NL')/WorkersWS";
      string _userName = "UserName";
      string _wsKey = "Password";
      byte[] _authenticationParameter = Encoding.UTF8.GetBytes(_userName + ":" + _wsKey);
      _client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(_authenticationParameter));
      HttpResponseMessage response = await _client.DeleteAsync(_url + "/" + rtbE_Tag.Text);//this textbox holds this: W/ABC12345 nr which is like a primary key
      response.EnsureSuccessStatusCode();
   }
   catch (Exception ex)
   {

   }
} 

 

When I use the code to try using the ODATA web service the code breaks at: response.EnsureSuccessStatusCode();