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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: 6 rules found
redundant
    Impact
      Clean code attribute
        1. Null checks should not be combined with "is" operator checks

           Code Smell
        2. Jump statements should not be redundant

           Code Smell
        3. Nullable type comparison should not be redundant

           Bug
        4. Boolean expressions should not be gratuitous

           Code Smell
        5. Redundant casts should not be used

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

           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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