Code inspection: Mismatch of optional parameter value in overridden method

This inspection reports a method override or implementation whose optional parameter does not match the base member. That can mean the derived member is missing an optional default value, or it uses a different default value than the corresponding parameter in the base declaration.

Example

                class Base
                {
                    public virtual void Log(string message, int level = 1)
                    {
                    }
                }
                class Derived : Base
                {
                    public override void Log(string message, int level = 2)
                    {
                    }
                }
            

                class Base
                {
                    public virtual void Log(string message, int level = 1)
                    {
                    }
                }
                class Derived : Base
                {
                    public override void Log(string message, int level = 1)
                    {
                    }
                }
            

Quick-fix

The quick-fix copies the default value from the base member, or removes the default value if the base member does not define one.

01 April 2026