You can use the Visual Studio debugger to debug XSLT. The debugger supports setting breakpoints, viewing XSLT execution states, and so on.
The XSLT debugger is only available in the Enterprise edition of Visual Studio 2017.
The XSLT profiler is a tool that allows developers to measure, evaluate, and target performance-related problems in XSLT code by creating detailed XSLT performance reports.
- Editing XSLT Style Sheets discusses using the XML Editor to edit style sheets.
- Security considerations when working with XML data discusses security issues that you need to know about when working the XML Editor or the XSLT debugger.
- Debugging in Visual Studio introduces the Visual Studio debugger.
- XSLT reference provides reference material for XSLT elements and functions.