# Maintaining Custom Document Properties > Custom properties can be used to store additional information about the document in the document itself. This article explains how to load and save these properties. - **Author:** Bjoern Meyer - **Published:** 2020-02-18 - **Modified:** 2026-07-17 - **Description:** Custom properties can be used to store additional information about the document in the document itself. This article explains how to load and save these properties. - **2 min read** (209 words) - **Tags:** - ASP.NET - Document Properties - Windows Forms - WPF - **Web URL:** https://www.textcontrol.com/blog/2020/02/18/maintaining-custom-document-properties/ - **LLMs URL:** https://www.textcontrol.com/blog/2020/02/18/maintaining-custom-document-properties/llms.txt - **LLMs-Full URL:** https://www.textcontrol.com/blog/2020/02/18/maintaining-custom-document-properties/llms-full.txt --- Custom properties are used to store additional information in a document. These properties remain with a document and can be viewed by all MS Word users that open the document. Several property management servers provide data tracking capabilities to search for, sort, and track documents based on document properties. In TX Text Control, these properties can be accessed and created using the UserDefinedPropertyDictionaryclass. The *UserDefinedPropertyDictionary* class is used with the LoadSettings.UserDefinedDocumentPropertiesand SaveSettings.UserDefinedDocumentPropertiesproperties. Each entry in the dictionary is a key/value pair, where the key is the name of the document property and the value is the document property's value. In order to access these properties when loading a document, you will have to use the *LoadSettings* in the Load method. ``` var loadedProperties; using (TXTextControl.ServerTextControl tx = new TXTextControl.ServerTextControl()) { tx.Create(); TXTextControl.LoadSettings loadSettings = new TXTextControl.LoadSettings(); tx.Load(docFile, TXTextControl.StreamType.WordprocessingML, loadSettings); if (loadSettings.UserDefinedDocumentProperties != null) { loadedProperties = loadSettings.UserDefinedDocumentProperties; } } ``` On saving the document, you will have to pass the dictionary using the *SaveSettings* in the Save method. ``` TXTextControl.SaveSettings saveSettings = new TXTextControl.SaveSettings() { UserDefinedDocumentProperties = loadedProperties }; tx.Save(editedFile, TXTextControl.StreamType.WordprocessingML, saveSettings); ``` It is important to pass these properties explicitly when saving the document. Otherwise, the properties are not maintained during the save method. --- ## About Bjoern Meyer As CEO, Bjoern is the visionary behind our strategic direction and business development, bridging the gap between our customers and engineering teams. His deep passion for coding and web technologies drives the creation of innovative products. If you're at a tech conference, be sure to stop by our booth - you'll most likely meet Bjoern in person. With an advanced graduate degree (Dipl. Inf.) in Computer Science, specializing in AI, from the University of Bremen, Bjoern brings significant expertise to his role. In his spare time, Bjoern enjoys running, paragliding, mountain biking, and playing the piano. - [LinkedIn](https://www.linkedin.com/in/bjoernmeyer/) - [X](https://x.com/txbjoern) - [GitHub](https://github.com/bjoerntx) --- ## Related Posts - [TX Text Control 34.0 SP4 is Now Available: What's New in the Latest Version](https://www.textcontrol.com/blog/2026/05/20/tx-text-control-34-0-sp4-is-now-available/llms.txt) - [TXTextControl.Markdown.Core 34.1.0-beta: Work with Full Documents, Selection, and SubTextParts](https://www.textcontrol.com/blog/2026/04/14/txtextcontrol-markdown-core-34-1-0-beta-work-with-full-documents-selection-and-subtextparts/llms.txt) - [TX Spell .NET 11.0 SP1 is Now Available: What's New in the Latest Version](https://www.textcontrol.com/blog/2026/04/08/tx-spell-net-11-0-sp1-is-now-available/llms.txt) - [TX Text Control 34.0 SP2 is Now Available: What's New in the Latest Version](https://www.textcontrol.com/blog/2026/02/18/tx-text-control-34-0-sp2-is-now-available/llms.txt) - [TX Text Control 34.0 SP1 is Now Available: What's New in the Latest Version](https://www.textcontrol.com/blog/2025/12/03/tx-text-control-34-0-sp1-is-now-available/llms.txt) - [Introducing TX Text Control 34.0: Your Next Leap in Document Processing](https://www.textcontrol.com/blog/2025/11/10/introducing-tx-text-control-34-0-your-next-leap-in-document-processing/llms.txt) - [Sneak Peek: TX Text Control 34.0 Coming November 2025](https://www.textcontrol.com/blog/2025/10/02/sneak-peek-tx-text-control-34-0-coming-november-2025/llms.txt) - [TX Text Control 33.0 SP3 is Now Available: What's New in the Latest Version](https://www.textcontrol.com/blog/2025/08/14/tx-text-control-33-0-sp3-is-now-available/llms.txt) - [TX Text Control 33.0 SP2 is Now Available: What's New in the Latest Version](https://www.textcontrol.com/blog/2025/06/18/tx-text-control-33-0-sp2-is-now-available/llms.txt) - [Document Lifecycle Optimization: Leveraging TX Text Control's Internal Format](https://www.textcontrol.com/blog/2025/05/16/document-lifecycle-optimization-leveraging-tx-text-controls-internal-format/llms.txt) - [Expert Implementation Services for Legacy System Modernization](https://www.textcontrol.com/blog/2025/05/07/expert-implementation-services-for-legacy-system-modernization/llms.txt) - [Service Pack Releases: What's New in TX Text Control 33.0 SP1 and 32.0 SP5](https://www.textcontrol.com/blog/2025/05/07/service-pack-releases-whats-new-in-tx-text-control-33-0-sp1-and-32-0-sp5/llms.txt) - [Top 5 Real-World Applications for TX Text Control Document Processing Libraries](https://www.textcontrol.com/blog/2025/04/01/top-5-real-world-applications-for-tx-text-control-document-processing-libraries/llms.txt) - [DWX Developer Week Moves to Mannheim - And Text Control Is on Board!](https://www.textcontrol.com/blog/2025/03/19/dwx-developer-week-moves-to-mannheim-and-tx-text-control-is-on-board/llms.txt) - [The Wait is Over: TX Text Control for Linux is Officially Here](https://www.textcontrol.com/blog/2025/03/12/the-wait-is-over-tx-text-control-for-linux-is-officially-here/llms.txt) - [Full .NET 9 Support in Text Control .NET Components for ASP.NET Core, Windows Forms, and WPF](https://www.textcontrol.com/blog/2024/11/11/full-net-9-support-in-text-control-net-components-for-asp-net-core-windows-forms-and-wpf/llms.txt) - [Toggle Field Codes in TX Text Control](https://www.textcontrol.com/blog/2024/11/07/toggle-field-codes-in-tx-text-control/llms.txt) - [TX Text Control 32.0 Service Pack 4 Released](https://www.textcontrol.com/blog/2024/09/02/tx-text-control-32-0-service-pack-4-released/llms.txt) - [Service Pack 3: MailMerge Supports SVG Images](https://www.textcontrol.com/blog/2024/04/29/service-pack-3-mailmerge-supports-svg-images/llms.txt) - [TX Text Control 32.0 Service Pack 3 Released](https://www.textcontrol.com/blog/2024/04/29/tx-text-control-32-0-service-pack-3-released/llms.txt) - [Electronic Invoicing will Become Mandatory in Germany in 2025](https://www.textcontrol.com/blog/2024/04/10/electronic-invoicing-will-become-mandatory-in-germany-in-2025/llms.txt) - [Inserting MergeBlocks with the DataSourceManager and Applying Table Styles in C#](https://www.textcontrol.com/blog/2024/04/09/inserting-mergeblocks-with-the-datasourcemanager-and-applying-table-styles-in-csharp/llms.txt) - [The Power of SubTextParts: Typical Use Cases](https://www.textcontrol.com/blog/2024/02/09/the-power-of-subtextparts-typical-use-cases/llms.txt) - [Renaming Merge Blocks and Merge Fields Programmatically in C#](https://www.textcontrol.com/blog/2024/02/08/renaming-merge-blocks-and-merge-fields-programmatically-in-csharp/llms.txt) - [Encapsulating TX Text Control in Class Libraries](https://www.textcontrol.com/blog/2024/01/09/encapsulating-tx-text-control-in-class-libraries/llms.txt)