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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
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  • Quick Fix 61
Filtered: 4 rules found
denial-of-service
    Impact
      Clean code attribute
        1. Classes should "Dispose" of members from the classes' own "Dispose" methods

           Bug
        2. Classes with "IDisposable" members should implement "IDisposable"

           Bug
        3. "IDisposables" should be disposed

           Bug
        4. Regular expressions should not be vulnerable to Denial of Service attacks

           Vulnerability

        Classes with "IDisposable" members should implement "IDisposable"

        intentionality - complete
        reliability
        Bug
        • cwe
        • denial-of-service

        Why is this an issue?

        More Info

        An IDisposable object should be disposed (there are some rare exceptions where not disposing is fine, most notably Task). If a class has an IDisposable field, there can be two situations:

        • The class observes a field that is under the responsibility of another class.
        • The class owns the field, and is therefore responsible for calling Dispose on it.

        In the second case, the safest way for the class to ensure Dispose is called is to call it in its own Dispose function, and therefore to be itself IDisposable. A class is considered to own an IDisposable field resource if it created the object referenced by the field.

        Noncompliant code example

        public class ResourceHolder   // Noncompliant; doesn't implement IDisposable
        {
            private FileStream fs;  // This member is never Disposed
            public void OpenResource(string path)
            {
                this.fs = new FileStream(path, FileMode.Open); // I create the FileStream, I'm owning it
            }
            public void CloseResource()
            {
                this.fs.Close();
            }
        }
        

        Compliant solution

        public class ResourceHolder : IDisposable
        {
            private FileStream fs;
            public void OpenResource(string path)
            {
                this.fs = new FileStream(path, FileMode.Open); // I create the FileStream, I'm owning it
            }
            public void CloseResource()
            {
                this.fs.Close();
            }
            public void Dispose()
            {
                this.fs.Dispose();
            }
        }
        
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