Ways to Split PDF file into Multiple files and Pages using C#

SplitPdfByRange.cs

/*
 * Split PDF file by Given Range into Single Page files using C#
 */
// Define output file(s) format
string filePathOut = "path/splitPDF_{0}.{1}";

// Define Range to extract as single page documents
SplitOptions splitOptions = new SplitOptions(filePathOut, 3, 7);

// Load the PDF file & Split PDF according to split options
using (Merger merger = new Merger("path/document.pdf"))
{
    merger.Split(splitOptions);
}

SplitPdfByRangeAndFilter.cs

/*
 * Split PDF file by Given Range & Filter (Even/Odd Pages) into Single Page files using C#
 */
// Define output file(s) format
string filePathOut = "path/splitPDF_{0}.{1}";

// Define Range & Filter to extract all the ODD Pages in the given Range as single page documents
SplitOptions splitOptions = new SplitOptions(filePathOut, 3, 7, RangeMode.OddPages);

// Load the PDF file & Split PDF according to split options
using (Merger merger = new Merger("path/document.pdf"))
{
    merger.Split(splitOptions);
}

SplitPDFintoMultiPageFiles.cs

/*
 * Split PDF files into multipage files using C#
 */
// Define output file(s) format
string filePathOut = "path/splitPDF_{0}.{1}";

// Define Splitting Intervals and Split Mode
SplitOptions splitOptions = new SplitOptions(filePathOut, new int[] { 3, 6, 8 }, SplitMode.Interval);

// Load the PDF file & Split PDF according to split options
using (Merger merger = new Merger("path/document.pdf"))
{
    merger.Split(splitOptions);
} 

SplitPDFToSinglePages.cs

/*
 * Split PDF file into Single Page files using C#
 */
// Define output file(s) format
string filePathOut = "path/splitPDF_{0}.{1}";

// Define pages to get extracted as single page document
SplitOptions splitOptions = new SplitOptions(filePathOut, new int[] { 3, 6, 8 });

// Load the PDF file & Split PDF according to split options
using (Merger merger = new Merger("path/document.pdf"))
{
    merger.Split(splitOptions);
}