SonarSource Rules
  • Products

    In-IDE

    Code Quality and Security in your IDE with SonarQube Ide

    IDE extension that lets you fix coding issues before they exist!

    Discover SonarQube for IDE

    SaaS

    Code Quality and Security in the cloud with SonarQube Cloud

    Setup is effortless and analysis is automatic for most languages

    Discover SonarQube Cloud

    Self-Hosted

    Code Quality and Security Self-Hosted with SonarQube Server

    Fast, accurate analysis; enterprise scalability

    Discover SonarQube Server
  • SecretsSecrets
  • ABAPABAP
  • AnsibleAnsible
  • ApexApex
  • AzureResourceManagerAzureResourceManager
  • CC
  • C#C#
  • C++C++
  • CloudFormationCloudFormation
  • COBOLCOBOL
  • CSSCSS
  • DartDart
  • DockerDocker
  • FlexFlex
  • GitHub ActionsGitHub Actions
  • GoGo
  • HTMLHTML
  • JavaJava
  • JavaScriptJavaScript
  • JSONJSON
  • JCLJCL
  • KotlinKotlin
  • KubernetesKubernetes
  • Objective CObjective C
  • PHPPHP
  • PL/IPL/I
  • PL/SQLPL/SQL
  • PythonPython
  • RPGRPG
  • RubyRuby
  • RustRust
  • ScalaScala
  • SwiftSwift
  • TerraformTerraform
  • TextText
  • TypeScriptTypeScript
  • T-SQLT-SQL
  • VB.NETVB.NET
  • VB6VB6
  • XMLXML
  • YAMLYAML
C#

C# static code analysis

Unique rules to find Bugs, Vulnerabilities, Security Hotspots, and Code Smells in your C# code

  • All rules 493
  • Vulnerability46
  • Bug88
  • Security Hotspot24
  • Code Smell335

  • Quick Fix 61
Filtered: 6 rules found
unpredictable
    Impact
      Clean code attribute
        1. "Thread.Resume" and "Thread.Suspend" should not be used

           Bug
        2. "Assembly.Load" should be used

           Code Smell
        3. "SafeHandle.DangerousGetHandle" should not be called

           Bug
        4. Mutable fields should not be "public static"

           Code Smell
        5. Culture should be specified for "string" operations

           Code Smell
        6. "GC.Collect" should not be called

           Code Smell

        "SafeHandle.DangerousGetHandle" should not be called

        consistency - conventional
        reliability
        Bug
        • leak
        • unpredictable

        Why is this an issue?

        More Info

        The SafeHandle.DangerousGetHandle method poses significant risks and should be used carefully. This method carries the inherent danger of potentially returning an invalid handle, which can result in resource leaks and security vulnerabilities. Although it is technically possible to utilize this method without encountering issues, doing so correctly requires a high level of expertise. Therefore, it is recommended to avoid using this method altogether.

        What is the potential impact?

        The SafeHandle.DangerousGetHandle method is potentially prone to leaks and vulnerabilities due to its nature and usage. Here are a few reasons why:

        • Invalid handles: the method retrieves the raw handle value without performing any validation or safety checks. This means that the method can return a handle that is no longer valid or has been closed, leading to undefined behavior or errors when attempting to use it.
        • Resource leaks: by directly accessing the handle without the proper safeguards and cleanup provided by the SafeHandle class, there is an increased risk of failing to dispose system resources correctly.
        • Security vulnerabilities: when the handle is interacting with sensitive resources (e.g. file handles, process handles) using SafeHandle.DangerousGetHandle without proper validation can lead to security vulnerabilities that can be exploited by an attacker.
        static void Main(string[] args)
        {
            System.Reflection.FieldInfo fieldInfo = ...;
            SafeHandle handle = (SafeHandle)fieldInfo.GetValue(rKey);
            IntPtr dangerousHandle = handle.DangerousGetHandle(); // Noncompliant
        }
        
          Available In:
        • SonarQube IdeCatch issues on the fly,
          in your IDE
        • SonarQube CloudDetect issues in your GitHub, Azure DevOps Services, Bitbucket Cloud, GitLab repositories
        • SonarQube Community BuildAnalyze code in your
          on-premise CI
          Available Since
          9.1
        • SonarQube ServerAnalyze code in your
          on-premise CI
          Developer Edition
          Available Since
          9.1

        © 2008-2025 SonarSource SA. All rights reserved.

        Privacy Policy | Cookie Policy | Terms of Use