Experiment and learn how to write effective and efficient queries for CodeQL databases generated from C# codebases.

.. toctree::
   :hidden:

   basic-query-for-csharp-code
   codeql-library-for-csharp
   analyzing-data-flow-in-csharp
   customizing-library-models-for-csharp

• :doc:`Basic query for C# code <basic-query-for-csharp-code>`: Learn to write and run a simple CodeQL query.
• :doc:`CodeQL library for C# <codeql-library-for-csharp>`: When you're analyzing a C# program, you can make use of the large collection of classes in the CodeQL library for C#.
• :doc:`Analyzing data flow in C# <analyzing-data-flow-in-csharp>`: You can use CodeQL to track the flow of data through a C# program to its use.
• :doc:`Customizing library models for C# <customizing-library-models-for-csharp>`: You can model frameworks and libraries that your codebase depends on using data extensions and publish them as CodeQL model packs.