By default, changes from the two input files (source and target files) are added to the output document and highlighted. Use the ShowInsertedContent and ShowDeletedContent properties to configure the content of the output file.
Use the LeaveGaps property to adjust the display of the output document, which allows to replace changed content with empty lines. To use this property, activate the ShowInsertedContent and ShowDeletedContent properties.
Follow these steps to adjust appearance of the output document:
Instantiate the Comparer object. Specify the source file path or stream.
Call the add() method. Specify the target file path or stream.