Open Closed Principle in C# with example

Hi Experts

I have a query regarding the open-closed principle in C#.

As per the principle – classes, functions or modules are open to extension but closed for modification.

Consider the following class: -

public class DBOperations
{
    public void Delete()
    { }

    public void Upsert(object entity)
    { }

    public List<object> GetAll()
    {
        return new List<object>();
    }
}

Now, the requirement is to add one more method to create a stored procedure. As the “DBOperations” class should be closed for modification and open and extension, I will create another class.

public class DBOperationsExt : DBOperations
{
    public void ExecuteStoredProcedure(string storedProcName, ....)
    { }
}

Can I say that the above approach qualifies the open-closed principle?