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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: 17 rules found
error-handling
    Impact
      Clean code attribute
        1. Logging in a catch clause should pass the caught exception as a parameter.

           Code Smell
        2. Azure Functions should log all failures

           Code Smell
        3. Azure Functions should use Structured Error Handling

           Code Smell
        4. Delivering code in production with debug features activated is security-sensitive

           Security Hotspot
        5. Exceptions should not be created without being thrown

           Bug
        6. Exception types should be "public"

           Code Smell
        7. Exceptions should not be explicitly rethrown

           Code Smell
        8. "catch" clauses should do more than rethrow

           Code Smell
        9. Generic exceptions should not be ignored

           Code Smell
        10. Exceptions should not be thrown from property getters

           Code Smell
        11. Overflow checking should not be disabled for "Enumerable.Sum"

           Code Smell
        12. "Exception" should not be caught

           Code Smell
        13. Classes named like "Exception" should extend "Exception" or a subclass

           Code Smell
        14. Exceptions should be either logged or rethrown but not both

           Code Smell
        15. NullReferenceException should not be caught

           Code Smell
        16. Exceptions should not be thrown in finally blocks

           Code Smell
        17. General or reserved exceptions should never be thrown

           Code Smell

        Classes named like "Exception" should extend "Exception" or a subclass

        consistency - identifiable
        maintainability
        Code Smell
        • convention
        • error-handling
        • pitfall

        Why is this an issue?

        Clear, communicative naming is important in code. It helps maintainers and API users understand the intentions for and uses of a unit of code. Using "exception" in the name of a class that does not extend Exception or one of its subclasses is a clear violation of the expectation that a class' name will indicate what it is and/or does.

        Noncompliant code example

        public class FruitException // Noncompliant - this has nothing to do with Exception
        {
          private Fruit expected;
          private string unusualCharacteristics;
          private bool appropriateForCommercialExploitation;
          // ...
        }
        
        public class CarException // Noncompliant - does not derive from any Exception-based class
        {
          public CarException(string message, Exception inner)
          {
             // ...
          }
        }
        

        Compliant solution

        public class FruitSport // Compliant - class name does not end with 'Exception'
        {
          private Fruit expected;
          private string unusualCharacteristics;
          private bool appropriateForCommercialExploitation;
          // ...
        }
        
        public class CarException: Exception // Compliant - correctly extends System.Exception
        {
          public CarException(string message, Exception inner): base(message, inner)
          {
             // ...
          }
        }
        
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