Code Inspection: Non-accessed field (Private accessibility)

Category	Potential Code Quality Issues
ID	`NotAccessedField.Local`
EditorConfig	`resharper_not_accessed_field_local_highlighting`
Default severity	Warning
Language	C#, VB.NET, XAML
Requires SWA	No

C# compiler can issue a number of warnings regarding unused fields:

CS0649: Field is never assigned to, and will always have its default value
CS0169: Private field is never used
CS0414: Private field is assigned a constant value but never used

Although JetBrains Rider knows about all these warnings and provides design-time notifications for them, it goes one step further and detects unused fields not covered by compiler warnings. The example below shows that even if a field is assigned non-constant value and has no read usages, JetBrains Rider will help you detect the unused member.

class Foo
{
    private int _a; // CS0414
    private int _b; // No compiler warnings, but JetBrains Rider issues its own warning here

    public Foo(int value)
    {
      _a = 1;
      _b = value;
    }
}
    

Last modified: 17 April 2024