Thank you for your interests in our Free Spire.Presentation for .NET. It is totally free without any warning message for your commercial and personal use. Free version is limited to 10 presentation slides. This limitation is enforced during reading or writing PPT, PPTX. When converting PowerPoint files to PDF, you can only get the first 3 pages of PDF file.

If your requirements exceed the limitation, please use our Commercial Edition of Spire.Presentation.

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