C#

   //clean up
    GC.Collect();
    GC.WaitForPendingFinalizers();
    Marshal.ReleaseComObject(xlSheet);
    Marshal.ReleaseComObject(xlBook);<br />
    Marshal.ReleaseComObject(xlApp);

//xlSheet, xlBook, xlApp are representing accordingly: Sheet, Workbook and MS Excel application instance

public static async Task UploadFile(HttpClient client, string url, string filePath, string contentType, CancellationToken cancellationToken)
{
    // Argument validation omitted...
    
    using (var fileStream = File.OpenRead(filePath))
    {
        var file = new StreamContent(fileStream);
        file.Headers.ContentType = MediaTypeHeaderValue.Parse(mimeType);
        file.Headers.ContentLength = fileStream.Length;
        
        var content = new MultipartFormDataContent();
        content.Add(file, "file", Path.GetFileName(filePath));
        
        using (var response = await client.PostAsync(url, content, cancellationToken).ConfigureAwait(false))
        {
            response.EnsureSuccessStatusCode();
        }
    }
}

using (var formData = new MultipartFormDataContent())
{
                Task<HttpResponseMessage> responseMessage = null; 
                using (var stream = File.OpenRead(pdf))
                {
                    HttpContent fileStreamContent = new StreamContent(stream);
                    fileStreamContent.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("form-data") 
                          { Name = "DigitalPCN", FileName = Path.GetFileName(fine.FileName) };
                    fileStreamContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/pdf");
                    formData.Add(fileStreamContent);

                    responseMessage = base.PostAsync(new Uri(@"https://localhost:44349/api/Controller/Method"), formData, token);
                    responseMessage.Wait();
                }

                return responseMessage.Result;
}

SshClient SSHObj = null;
private void BTNConnect_Click(object sender, EventArgs e)
{
  string Address = TXTHost.Text;
  string Port = TXTPort.Text;
  string UserName = TXTUserName.Text;
  string Password = TXTPassword.Text;
  int NumPort = Int32.Parse(Port);
  SSHObj = new SshClient(Address, NumPort, UserName, Password);
  SSHObj.Connect();
}

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.

jkirkerx wrote:

9 pin dot matrix

using (RasterCodecs codecs = new RasterCodecs())
{
   // Set Image Load Options
   codecs.Options.Load.XResolution = 300;
   codecs.Options.Load.YResolution = 300;
   codecs.Options.Load.AllPages = true;

   // Load Image
   RasterImage sourceFile = codecs.Load(fileName);
            
   // Add All Pages to Recognition Document
   _ocrDocument.Pages.AddPages(sourceFile, 1, -1, null);

   // Define Recognition Zone
   OcrZone ocrZone = new OcrZone();
   ocrZone.Bounds = new LeadRect(50, 50, 300, 100);
   ocrZone.ZoneType = OcrZoneType.Text;

   // Add Zone to Recognition Document
   _ocrDocument.Pages[0].Zones.Add(ocrZone);

   // Define Native Recognition Zone using the DotMatrix Recognition Module
   NativeOcrZone dotMatrx = new NativeOcrZone();
   dotMatrx.Bounds = ocrZone.Bounds;
   dotMatrx.ZoneType = NativeOcrZoneType.Text;
   dotMatrx.RecognitionModule = NativeOcrZoneRecognitionModule.DotMatrix;

   // Set Existing Previous Zone to Use the Native Recognition Zone
   _ocrEngine.ZoneManager.SetNativeZone(_ocrDocument.Pages[0], 0, dotMatrx);
}