. NET Learning notes----2015-06-24 (ArrayList collection Exercise)

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Threading.Tasks;usingSystem.Collections;namespace_18 Collection of exercises {classProgram {Static voidMain (string[] args) {            #regionCreate a collection that adds numbers, averages and values, and a maximum and minimum value//ArrayList list = new ArrayList (); //list.            AddRange (New int[] {1, 2, 3, 4, 5}); //int sum = 0; //int max = (int) list[0]; //int min = (int) list[0]; //for (int i = 0; i < list. Count; i++)//{            //if ((int) list[i] > Max)//    {            //max = (int) list[i]; //    }            //sum + = (int) list[i]; //}            //Console.WriteLine ("The sum of the numbers in this set is {0}, the average is {1}, the maximum value is {2}", Sum, sum/list.)            Count, Max); //Console.readkey ();            #endregion            #regionWrite a set of length 10, which requires that 10 numbers (0-9) be stored randomly, requiring all numbers not to be duplicatedArrayList List=NewArrayList (); Random R=NewRandom ();  for(inti =0; I <Ten; i++)            {                intRnumber = R.next (0, -); //indicates that there is no random number in the collection                if(!list. Contains (Rnumber)) {list.                ADD (Rnumber); }                Else//indicates that there is no random number in the collection                {                    //once a repeating random number is generated, this cycle does not count, so i--i--; }            }             for(inti =0; I < list. Count; i++) {Console.WriteLine (list[i]);            } console.readkey (); #endregion        }    }}

ArrayList collection is not commonly used at present, because although it is convenient to store data, it is too cumbersome to extract.

. NET Learning notes----2015-06-24 (ArrayList collection Exercise)