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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: 14 rules found
bad-practice
    Impact
      Clean code attribute
        1. "ExcludeFromCodeCoverage" attributes should include a justification

           Code Smell
        2. Client instances should not be recreated on each Azure Function invocation

           Code Smell
        3. Azure Functions should be stateless

           Code Smell
        4. "is" should not be used with "this"

           Code Smell
        5. "Thread.Sleep" should not be used in tests

           Code Smell
        6. "nameof" should be used

           Code Smell
        7. Formatting SQL queries is security-sensitive

           Security Hotspot
        8. Loops with at most one iteration should be refactored

           Bug
        9. Tests should not be ignored

           Code Smell
        10. "switch" statements should have at least 3 "case" clauses

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

           Code Smell
        12. Nested code blocks should not be used

           Code Smell
        13. "Obsolete" attributes should include explanations

           Code Smell
        14. Standard outputs should not be used directly to log anything

           Code Smell

        "nameof" should be used

        adaptability - modular
        maintainability
        Code Smell
        • bad-practice

        Why is this an issue?

        Because parameter names could be changed during refactoring, they should not be spelled out literally in strings. Instead, use nameof(), and the string that’s output will always be correct.

        This rule raises an issue when a string in the throw statement contains the name of one of the method parameters.

        Noncompliant code example

        void DoSomething(int someParameter, string anotherParam)
        {
            if (someParameter < 0)
            {
                throw new ArgumentException("Bad argument", "someParameter");  // Noncompliant
            }
            if (anotherParam == null)
            {
                throw new Exception("anotherParam should not be null"); // Noncompliant
            }
        }
        

        Compliant solution

        void DoSomething(int someParameter)
        {
            if (someParameter < 0)
            {
                throw new ArgumentException("Bad argument", nameof(someParameter));
            }
            if (anotherParam == null)
            {
                throw new Exception($"{nameof(anotherParam)} should not be null");
            }
        }
        

        Exceptions

        • The rule doesn’t raise any issue when using C# < 6.0.
        • When the parameter name is contained in a sentence inside the throw statement string, the rule will raise an issue only if the parameter name is at least 5 characters long. This is to avoid false positives.
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          Available Since
          9.1
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          Developer Edition
          Available Since
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