Program.cs

#region Tree

var root = new Composite("root");
root.Add(new Leaf("Leaf A"));
root.Add(new Leaf("Leaf B"));

var co = new Composite("CompositeA");
co.Add(new Leaf("Leaf X"));
co.Add(new Leaf("Leaf Y"));
var co1 = new Composite("CompositeA");
co1.Add(new Leaf("Leaf P"));
co1.Add(new Leaf("Leaf Q"));

co.Add(co1);
root.Add(co);
root.Display(0);

#endregion Tree

#region Company

Company company = new ConcreteCompany("华隆总公司");
var huaDongCompany = new ConcreteCompany("华隆华东分公司");
var huaBeiCompany = new ConcreteCompany("华隆华北分公司");
company.Add(huaDongCompany);
company.Add(huaBeiCompany);

huaDongCompany.Add(new HrDepartment("华隆华东分公司Hr部门"));
huaDongCompany.Add(new FinanceDepartment("华隆华东分公司财务部门"));

huaBeiCompany.Add(new HrDepartment("华隆华北分公司Hr部门"));
huaBeiCompany.Add(new FinanceDepartment("华隆华北分公司财务部门"));

company.Display(0);
company.LineOfDuty();

#endregion Company

Console.ReadLine();