Checkstyle defines a set of available modules, each of which provides rules checking with a configurable level of strictness (mandatory, optional...). Each rule can raise notifications, warnings, and errors. For example, checkstyle can examine: * Javadoc comments for classes, attributes and methods; * Naming conventions of attributes and methods; * Limit of the number of function parameters, line lengths; * Presence of mandatory headers; * The use of packets imports, of classes, of scope modifiers and of instructions blocks; * The spaces between some characters; * The good practices of class construction; * Duplicated code sections;[2] * Multiple complexity measurements, among which expressions.

* StyleCop provides value by enforcing a common set of style rules for C# code. StyleCop will continue to ship with a single, consistent set of rules, with minimal rule configuration allowed. Developers can implement their own rules if they so choose. * StyleCop ships with the ability to seamlessly integrate with Visual Studio, MSBuild, TFS, etc. Developers are free to implement custom code to integrate StyleCop into other development and tooling environments, as described in the SDK documentation.