Worked on stabilizing and improving the PDF watermark sample in the SyncfusionExamples/PDF-Examples repository, focusing on resolving a regression that affected watermark transparency. Addressed a bug in the .NET watermark example by correcting a typo that prevented the intended transparency from being applied, ensuring watermarks now display as designed. Also fixed a compilation issue encountered when adding watermarks to existing PDF documents, enhancing the reliability and consistency of the sample. Demonstrated strong debugging and code quality practices using C# and .NET, with careful documentation and clear commit history to support maintainability and reduce potential support escalations for future developers.