NullGuard enhances C# code by automatically adding null argument checks. It's a Fody add-in that analyzes code and inserts checks to prevent NullReferenceExceptions. NullGuard offers three modes: implicit, explicit, and nullable reference types, allowing developers to choose the best approach for their projects. The primary technology used is code analysis and code modification via Fody.
NullGuard provides flexible control over nullability checks with multiple modes. Its integration with Fody simplifies the process of adding null checks to existing projects. Supports nullability analysis using C# 8 nullable reference types. It also supports inheritance of nullability, ensuring consistent protection across code hierarchies. NullGuard is designed to be lightweight and integrates seamlessly with existing build processes.
- Implicit Mode: Automatically adds null checks for non-nullable types.
- Explicit Mode: Adds null checks based on the presence of
[NotNull]attributes. - Nullable Reference Types Mode: Leverages C# 8's built-in nullable reference type annotations.
- Flexible Configuration: Allows choosing between implicit, explicit, and NRT modes.
- Easy Integration: Seamlessly integrates with the Fody build system.
- Inheritance Support: Nullability is inherited through code hierarchies.
- Supports Atomic Properties: Null checks work for atomic properties and their setters/getters.
NullGuard is a mature and actively maintained project with a history of stable releases. It has a healthy number of stars and forks on GitHub, indicating community interest and adoption. Recent commits suggest ongoing development and support for newer C# features. Comprehensive documentation and active community channels (Gitter) are available.
Developers can use NullGuard to improve the reliability and robustness of their C# applications by proactively detecting and handling null reference exceptions. This reduces the risk of unexpected crashes and enhances the overall quality of the code. It's beneficial for applications where null values are prevalent or where ensuring data integrity is paramount.