Code Evaluation done for .Net

[Akbarkhan24]

Made these changes:
// 1. This is to generate identifier for the Employees
int identifier = 1;

    // 2. The Hire Method:
    public Position? Hire(Name person, string title)
    {
        Employee employee = new Employee(identifier++, person);
        return CheckDirectReportPositions(root, employee, title);
    }

    // 3. Created another method CheckDirectReportPositions() For checking the direct report positions and hiring if exists.

    private Position? CheckDirectReportPositions(Position pos, Employee employee, string title)