GrapeCity Documents for PDF supports the following types of license:

• Unlicensed
• Evaluation License
• Licensed

Unlicensed

After downloading the product, the product works in unlicensed mode. The following limitations are imposed when the product is used without license:

• Only 5 pages of the PDF file can be loaded for analyzing.
• On saving the PDF file, a watermark is displayed on all the pages in that file.
  'Unlicensed copy of GrapeCity PDF. Loading is limited to 5 pages. Contact us.sales@grapecity.com to get your 30-day evaluation key.'

Evaluation License

GcPdf evaluation license is available to users for 30 days to evaluate the product. If you want to evaluate the product, you can ask for evaluation license key by sending an email to us.sales@grapecity.com.

The evaluation version has an expiration date that is determined when an evaluation key is generated. After applying the evaluation license key, you can use the complete product until the license expiry date.

After the expiry date, the product works in unlicensed mode with the above mentioned limitations.

In such case, following watermark is displayed in the PDF file:

'Created with expired evaluation copy of GrapeCity PDF. Loading is limited to 5 pages. Contact us.sales@grapecity.com to purchase license.'

Licensed

GcPdf production license is issued at the time of purchase of the product. If you have a production license, you can access all the features of GcPdf without any limitations.

Apply License

To apply evaluation/production license in GcPdf, the long string key needs to be copied to the code in one of the following two ways.

• Pass it as an argument to the GcPdfDocument's ctor:
  var doc = new GcPdfDocument("key")
  This licenses the instance being created.
  
  
• Call a static method on GcPdfDocument:
  GcPdfDocument.SetLicenseKey("key");
  This licenses all the instances while the program is running.