NDepend 📖 Wikipedia

NDepend
Developer	NDepend
Stable release	2025.1
Operating system	Windows
Type	Software quality
License	Commercial, Proprietary
Website	ndepend.com

NDepend is a static analysis tool for C# and .NET code to manage code quality and security. The tool proposes a large number of features, from CI/CD Web Reporting to Quality Gate and Dependencies Visualization. For that reason, the community refers to it as the "Swiss Army Knife" for .NET Developers.

The main features of NDepend are:

• Interactive Web Reports about all Aspects of .NET Code Quality and Security Sample Reports Here. Reports can be built on any platform: Windows, Linux and MacOS
• [Roslyn Analyzers Issues Import https://www.ndepend.com/docs/reporting-roslyn-analyzers-issues]
• Quality Gates
• CI/CD Integration with Azure DevOps, GitHub Action, Bamboo, Jenkins, TeamCity, AppVeyor
• Dependency Visualization (using dependency graphs, and dependency matrix)
• Smart Technical Debt Estimation
• Declarative code rule over C# LINQ query (CQLinq).
• Software Metrics (NDepend currently supports more than 100 code metrics: Cyclomatic complexity; Afferent and Efferent Coupling; Relational Cohesion; Google page rank of .NET types; Percentage of code covered by tests, etc.)
• Code Coverage data import from Visual Studio coverage, dotCover, OpenCover, NCover, NCrunch.
• All results are compared against a baseline allowing the user to focus on newly identified issues.
• Integration with Visual Studio 2022, 2019, 2017, 2015, 2013, 2012, 2010, or can run as a standalone through VisualNDepend.exe, side by side with JetBrains Rider or Visual Studio Code.

Live code queries and code rules through LINQ queries is the backbone of NDepend, all features use it extensively. Here are some sample code queries:

• Base class should not use derivatives:

 // <Name>Base class should not use derivatives</Name>
 warnif count > 0 
 from baseClass in JustMyCodeTypes
 where baseClass.IsClass && baseClass.NbChildren > 0 // <-- for optimization!
 let derivedClassesUsed = baseClass.DerivedTypes.UsedBy(baseClass)
 where derivedClassesUsed.Count() > 0
 select new { baseClass, derivedClassesUsed }

• Avoid making complex methods even more complex (source code cyclomatic complexity):

 // <Name>Avoid making complex methods even more complex (source code cyclomatic complexity)</Name>
 warnif count > 0 
 from m in JustMyCodeMethods where
  !m.IsAbstract &&
   m.IsPresentInBothBuilds() &&
   m.CodeWasChanged()
 let oldCC = m.OlderVersion().CyclomaticComplexity
 where oldCC > 6 && m.CyclomaticComplexity > oldCC 
 select new { m,
     oldCC, 
     newCC = m.CyclomaticComplexity, 
     oldLoc = m.OlderVersion().NbLinesOfCode,
     newLoc = m.NbLinesOfCode,
 }

Additionally, the tool provides a live CQLinq query editor with code completion and embedded documentation.

• Design Structure Matrix
• List of tools for static code analysis
• Software visualization

• Official website

• Stack Overflow discussion: use of NDepend
• Johannes Rest on NDepend
• From Chaos to Clarity: Managing .NET Complexity with NDepend
• Benjamin Wolf on NDepend
• Exiting The Zone Of Pain: Static Analysis with NDepend.aspx (Scott Hanselman Program Manager, Microsoft) discusses NDepend
• Abhishek Sur on NDepend