The combination mode of structural design pattern

Structure
Intention	Combines objects into a tree structure to represent a "partial-whole" hierarchy. C o m P o s i t e makes the user consistent with the use of a single object and a composite object.
Applicability	You want to represent the part of the object-the overall hierarchy. You want users to ignore the difference between a combined object and a single object, and the user will use all the objects in the composite structure uniformly.

1  usingSystem;2     usingSystem.Collections;3 4     Abstract classComponent5     {6         protected stringStrName;7 8          PublicComponent (stringname)9         {TenStrName =name; One         } A  -         Abstract  Public voidAdd (Component c); -      the          Public Abstract voiddumpcontents (); -          -         //Other operations for delete, get, etc. -     } +  -     classcomposite:component +     { A         PrivateArrayList componentlist =NewArrayList (); at          -          PublicComposite (strings):Base(s) {} -  -         Override  Public voidAdd (Component c) -         { - Componentlist.add (c); in         } -  to          Public Override voiddumpcontents () +         { -             //First dump the name of this composite node theConsole.WriteLine ("Node: {0}", strName); *  $             //Then loops through children, and get then to dump their contentsPanax Notoginseng             foreach(Component Cinchcomponentlist) -             { the c.dumpcontents (); +             } A         } the     } +  -     classleaf:component $     { $          PublicLeaf (strings):Base(s) {} -  -         Override  Public voidAdd (Component c) the         { -Console.WriteLine ("cannot add to a leaf");Wuyi         } the  -          Public Override voiddumpcontents () Wu         { -Console.WriteLine ("Node: {0}", strName); About         } $     } -  -     /// <summary> -     ///Summary description for Client. A     /// </summary> +      Public classClient the     { - Component setuptree () $         { the             //Here we had to create a tree structure, the             //consisting of composites and Leafs.  theComposite root =NewComposite ("Root-composite"); the Composite Parentcomposite; - Composite Composite; in leaf leaf; the  theParentcomposite =Root; AboutComposite =NewComposite ("First Level-first sibling-composite"); the Parentcomposite. ADD (composite); theleaf =NewLeaf ("First Level-second sibling-leaf"); the Parentcomposite. Add (leaf); +Parentcomposite =Composite; -Composite =NewComposite ("Second Level-first sibling-composite"); the Parentcomposite. ADD (composite);BayiComposite =NewComposite ("Second Level-second sibling-composite"); the Parentcomposite. ADD (composite); the  -             //we'll leaf the second level-first sibling empty, and start -             //populating the second Level-second sibling theParentcomposite =Composite; theleaf =NewLeaf ("Third Level-first sibling-leaf"); the Parentcomposite. Add (leaf); the              -leaf =NewLeaf ("Third Level-second sibling-leaf"); the Parentcomposite. Add (leaf); theComposite =NewComposite ("Third Level-third Sibling-composite"); the Parentcomposite. ADD (composite);94  the             returnRoot; the         } the 98          Public Static intMain (string[] args) About         {    - Component Component;101Client C =NewClient ();102Component =C.setuptree ();103 104 component. Dumpcontents (); the             return 0;106         }107}

Combination Mode

The combination mode of structural design pattern