Private member written but never read (IDE0052)

Key dotnet.codequality.unread-private-member · Severity info · Category codequality

Microsoft code-style analyzer IDE0052. Flags a private field or property that is assigned but never read. The work that computes its value is wasted.

Incorrect

private DateTime _lastRun;

public void Run()
{
    _lastRun = DateTime.UtcNow; // written, never read
    Execute();
}

Correct

public void Run()
{
    Execute();
}