> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/uwp/basic-operations.md). # Basic operations - [Basic document operations in UWP](https://docs.apryse.com/uwp/basic-operations/basics.md): Learn how to open, save, lock, access pages, manipulate content, and extract data from PDF documents. Get started with PDF document management now! The Apryse uwp SDK streamlines secure document proce - [Open a PDF in UWP](https://docs.apryse.com/uwp/basic-operations/open.md): Learn how to open a PDF document from a memory buffer with full source code examples. Explore how to read and write PDF files efficiently using Apryse SDK. The Apryse uwp SDK streamlines secure docume - [Saving documents in UWP](https://docs.apryse.com/uwp/basic-operations/saving.md): Learn how to save PDF documents efficiently using Apryse's saving APIs from the PDFDoc class. Explore different saving modes like removing unused objects, incremental saving, and linearized format for - [Lock a PDF document in UWP](https://docs.apryse.com/uwp/basic-operations/lock.md): Learn how to effectively manage PDF document instances across multiple threads with Apryse SDK locking mechanisms. Ensure stability and performance by implementing reentrant mutex and readers-writer l - [Access PDF pages to add, copy, delete or rearrange in UWP](https://docs.apryse.com/uwp/basic-operations/pages.md): Learn how to efficiently manage PDF pages with code samples for copying, deleting, and rearranging pages. Access a PDF page sequence and optimize your document operations. The Apryse uwp SDK streamlin - [Access PDF content to read, write & edit in UWP](https://docs.apryse.com/uwp/basic-operations/page-content.md): Learn how to access PDF page content with the ElementReader API. Explore a powerful and efficient way to work with text, images, and more in PDF documents using Apryse SDK. Ideal for interactive appli - [Code samples for basic document operations in UWP](https://docs.apryse.com/uwp/basic-operations/samples.md): Learn how to read & write a PDF file from/to memory buffer, merge, copy, delete, rearrange PDF pages, and more with this informative guide. The Apryse uwp SDK streamlines secure document processing. - [APIs for basic document operations in UWP](https://docs.apryse.com/uwp/basic-operations/apis.md): Discover utility classes for basic operations on PDF documents in UWP (C#/VB/JS) using pdftron.PDF.PDFDoc. Enhance your PDF handling capabilities now! The Apryse uwp SDK streamlines secure document pr --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.apryse.com/uwp/basic-operations.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.