C # Generic Collection

Compare the efficiency of a generic collection and a non-generic collection in operation:

usingSystem;usingSystem.Collections;usingSystem.Collections.Generic;usingSystem.Diagnostics;usingSystem.Linq;usingSystem.Text;usingSystem.Threading.Tasks;namespacelistdemo{classProgram {Static voidMain (string[] args) {Console.WriteLine ("start test ArrayList:");            Testbegin ();            Testarraylist ();            Testend (); Console.WriteLine ("start Test list<t>:");            Testbegin ();            Testgenericlist ();            Testend ();        Console.read (); }        Static intCollectioncount =0; StaticStopwatch Watch =NULL; Private Static intTestcount =10000000; Static voidTestbegin () {GC. Collect ();//force an instant garbage collection of all codeGc. WaitForPendingFinalizers ();//suspending a thread, executing finalizers in the finalizer queue (destructor method)Gc. Collect ();//garbage collection of all code again, mainly including objects from the finalizer queueCollectioncount = GC. Collectioncount (0);//returns the number of garbage collections performed in generation 0Watch =NewStopwatch (); Watch.        Start (); }        Static voidTestend () {watch.            Stop (); Console.WriteLine ("time consuming:"+Watch.            Elapsedmilliseconds); Console.WriteLine ("garbage collection Times:"+ (GC. Collectioncount (0)-collectioncount)); }        Static voidtestarraylist () {ArrayList Al=NewArrayList (); inttemp =0;  for(inti =0; i < Testcount; i++) {al.                ADD (i); Temp= (int) Al[i]; } Al=NULL; }        Static voidtestgenericlist () {List<int> LISTT =Newlist<int>(); inttemp =0;  for(inti =0; i < Testcount; i++) {listt.add (i); Temp=Listt[i]; } LISTT=NULL; }    }}

If the number of collections is fixed and does not involve transformation, use an array with high efficiency or use LIST<T>.

C # Generic Collection