PDF to PDF/A

 1// Create the options class to set up the conversion process
 2var options = new PdfToPdfAOptions
 3{
 4    PdfAVersion = PdfAStandardVersion.PDF_A_3B
 5};
 6
 7// Add the source file
 8options.AddInput(new FileDataSource("path_to_your_pdf_file.pdf")); // replace with your actual file path
 9
10// Add the path to save the converted file
11options.AddOutput(new FileDataSource("path_to_the_converted_file.pdf"));
12
13// Run the conversion
14PdfConverter.Convert(options);

 1// Create the options class to set up the validation process
 2var options = new PdfAValidateOptions
 3{
 4    PdfAVersion = PdfAStandardVersion.PDF_A_1A
 5};
 6
 7// Add one or more files to be validated
 8options.AddInput(new FileDataSource("path_to_your_first_pdf_file.pdf")); // replace with your actual file path
 9options.AddInput(new FileDataSource("path_to_your_second_pdf_file.pdf"));
10// add more files as needed
11
12// Run the validation and get results
13var resultContainer = PdfConverter.Validate(options);
14
15// Check the resultContainer.ResultCollection property for validation results for each file:
16for (var i = 0; i < resultContainer.ResultCollection.Count; i++)
17{
18    var result = resultContainer.ResultCollection[i];
19    var validationResult = (PdfAValidationResult) result.Data;
20    var isValid = validationResult.IsValid; // Validation result for the i-th document
21}