How to load tiff image ?

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C#

VB

I have to develop a winforms based application. In it, I can load a image format tiff, this image containa multiple pages.
I wrote a simple code to load image in application memory.
Here is my code:

public string[] splitTiffPages(string sourceFile, string targetDirectory)
       {
           string[] returnImages;

           try
           {
               


               Image sourceImage = Bitmap.FromFile(sourceFile);
               Image[] sourceImages = splitTiffPages(sourceImage);

               int pageCount = sourceImages.Length;

               returnImages = new string[pageCount];
               for (int i = 0; i < pageCount; i++)
               {
                   FileInfo fi = new FileInfo(sourceFile);
                   string babyImg = targetDirectory + "\\" + fi.Name.Substring(0, (fi.Name.Length - fi.Extension.Length)) + "_PAGE" + (i + 1).ToString().PadLeft(3, '0') + fi.Extension;
                   sourceImages[i].Save(babyImg);
                   returnImages[i] = babyImg;
               }
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message);
               returnImages = null;
           }

           return returnImages;
       }

My code throws exceptions:
1. parameter is not valid.
2. out of memory

If I click on my tiff file, it will shows no preview available, I am seeing tiff file only in irfan viewer and fstone viewer these are third party tools.
Note: my tiff file has scanned image with multiple pages

Thanks in advance.