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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: 27 rules found
clumsy
    Impact
      Clean code attribute
        1. "Trace.WriteLineIf" should not be used with "TraceSwitch" levels

           Code Smell
        2. Arrays should not be created for params parameters

           Code Smell
        3. Jump statements should not be redundant

           Code Smell
        4. Empty "default" clauses should be removed

           Code Smell
        5. Empty "case" clauses that fall through to the "default" should be omitted

           Code Smell
        6. "string.ToCharArray()" and "ReadOnlySpan<T>.ToArray()" should not be called redundantly

           Bug
        7. Redundant property names should be omitted in anonymous classes

           Code Smell
        8. Declarations and initializations should be as concise as possible

           Code Smell
        9. "string.IsNullOrEmpty" should be used

           Code Smell
        10. Default parameter values should not be passed as arguments

           Code Smell
        11. Constructor and destructor declarations should not be redundant

           Code Smell
        12. The simplest possible condition syntax should be used

           Code Smell
        13. LINQ expressions should be simplified

           Code Smell
        14. Sequential tests should not check the same condition

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

           Code Smell
        16. Redundant modifiers should not be used

           Code Smell
        17. "try" statements with identical "catch" and/or "finally" blocks should be merged

           Code Smell
        18. Trivial properties should be auto-implemented

           Code Smell
        19. Runtime type checking should be simplified

           Code Smell
        20. Classes should not be empty

           Code Smell
        21. Inheritance list should not be redundant

           Code Smell
        22. Redundant casts should not be used

           Code Smell
        23. "ToString()" calls should not be redundant

           Code Smell
        24. A "while" loop should be used instead of a "for" loop

           Code Smell
        25. Overriding members should do more than simply call the same member in the base class

           Code Smell
        26. Boolean literals should not be redundant

           Code Smell
        27. Mergeable "if" statements should be combined

           Code Smell

        Overriding members should do more than simply call the same member in the base class

        intentionality - clear
        maintainability
        Code Smell
        Quick FixIDE quick fixes available with SonarLint
        • redundant
        • clumsy

        Why is this an issue?

        Overriding a method just to call the same method from the base class without performing any other actions is useless and misleading. The only time this is justified is in sealed overriding methods, where the effect is to lock in the parent class behavior. This rule ignores overrides of Equals and GetHashCode.

        NOTE: In some cases it might be dangerous to add or remove empty overrides, as they might be breaking changes.

        Noncompliant code example

        public override void Method() // Noncompliant
        {
          base.Method();
        }
        

        Compliant solution

        public override void Method()
        {
          //do something else
        }
        

        Exceptions

        If there is an attribute in any level of the overriding chain, then the overridden member is ignored.

        public class Base
        {
          [Required]
          public virtual string Name { get; set; }
        }
        
        public class Derived : Base
        {
          public override string Name
          {
            get
            {
              return base.Name;
            }
            set
            {
              base.Name = value;
            }
          }
        }
        

        If there is a documentation comment on the overriding method, it will be ignored:

        public class Foo : Bar
        {
            /// <summary>
            /// Keep this method for backwards compatibility.
            /// </summary>
            public override void DoSomething()
            {
                base.DoSomething();
            }
        }
        
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          Available Since
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          Developer Edition
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