类成员如何获取类对象实例

Question

    class Company
    {
        List<Department> deptList;        private List<Department> DeptList
        {
            get { return deptList; }
            set { deptList = value; }
        }    }
    class Department
    {
        private Company parent;        internal Company Parent
        {
            get 
            {
                //这里怎么写才能获得当前Company的对象实例？？？
            }
            //set { parent = value; }
        }
    }

Answer 1

class Department
     {
        private Company _parent;        public Department(Company parent)
        {
             this._parent = parent;
        }        internal Company Parent
         {
             get 
             { return this._parent;}
             //set { _parent = value; }
         }
     } 在Company类中，给List<Department>赋值时使用带参的构造函数来New Department(this)
如果Department的无参构造是必需的，使用Department.Parent时就判断下是否为null

Answer 2

真要较真的话就做成静态的 class Company
    {
     private static Company _Company;
      public static Company Company
      {
         get;
      }   
        List<Department> deptList;        private List<Department> DeptList
        {
            get { return deptList; }
            set { deptList = value; }
        }    }