The example demonstrates how to Flatten fields in PDF file.

flatten_fields.cs

// Create FlattenFieldsOptions object to set instructions
var options = new FlattenFieldsOptions();
// Add input file path
options.AddInput(new FileData("path_to_your_pdf_file.pdf"));
// Set output file path
options.AddOutput(new FileData("path_to_result_pdf_file.pdf"));
// Perform the process
PdfForm.Flatten(options);