C # Copy files

usingSystem;usingSystem.Collections;usingSystem.Collections.Generic;usingSystem.IO;usingSystem.Linq;usingSystem.Text;namespaceconsoleapplication2{Internal classProgram { Public Static voidMain (string[] args) {            using(varFS =NewFileStream ("Test.txt", FileMode.Open, FileAccess.Read)) {                using(varDest =NewFileStream ("Dest.txt", FileMode.OpenOrCreate, FileAccess.Write)) {                    varbytes =New byte[1024x768];  while(true)                    {                        varRead = fs. Read (Bytes,0, Bytes.                        Length); if(Read = =0)                        {                             Break; }                        Else{dest. Write (Bytes,0, read); }                    }                }            }        }        #regionTool methods/// <summary>        ///Find out all the indexes of substrings in the string, "CCC" in "CCCCC" that there is only one/// </summary>        /// <param name= "str" ></param>        /// <param name= "SubStr" ></param>        /// <returns></returns>        Private Staticlist<int> Allindexof (stringStrstringsubStr) {List<int> li =Newlist<int>(); vari =0; I=Str.            IndexOf (SUBSTR, stringcomparison.ordinal);  while(I! =-1) {li.                ADD (i); I= str. IndexOf (SUBSTR, i +substr.length, stringcomparison.ordinal); }            returnLi; }        /// <summary>        ///Select Sort/// </summary>        /// <param name= "arr" ></param>        Private Static voidSort (int[] arr) {             for(inti =0; I < arr. Length-1; i++)            {                 for(intj = i +1; J < arr. Length; J + +)                {                    if(Arr[i] >Arr[j]) {Swap (refArr[i],refArr[j]); }                }            }        }        /// <summary>        ///Bubble Sort/// </summary>        /// <param name= "arr" ></param>        Private Static voidBubblesort (int[] arr) {             for(inti =0; I < arr. Length-1; i++)            {                 for(intj =0; J < arr. Length-1I J + +)                {                    if(Arr[j] > arr[j +1]) {Swap (refARR[J],refArr[j +1]); }                }            }        }        /// <summary>        ///Exchange two values/// </summary>        /// <param name= "a" ></param>        /// <param name= "B" ></param>        /// <typeparam name= "T" ></typeparam>        Private Static voidSwap<t> (refT A,refT B) {T T=A; A=b; b=T; }        Private Static voidPrint<t>(t[] arr) {stringstr =typeof(T) +"["; if(arr.) Length! =0)            {                 for(vari =0; I < arr. Length-1; i++) {str+ = Arr[i] +", "; } STR+ = Arr[arr. Length-1]; } STR+="]";        Print (str); }        Private Static voidJprint<t>(t[] arr) {stringstr =typeof(T) +"["; if(arr.) Length! =0)            {                 for(vari =0; I < arr. Length-1; i++) {str+ = Arr[i] +", "; } STR+ = Arr[arr. Length-1]; } STR+="]";        Print (str); }         Public Static voidPrint (stringObjparams Object[] Arg)        {Console.WriteLine (obj, Arg); }         Public Static voidJprint (stringObjparams Object[] Arg)        {Console.WriteLine (obj, Arg); }         Public Static voidPrint (Objectobj)        {Console.WriteLine (obj); }         Public Static voidJprint (Objectobj)        {Console.WriteLine (obj); }        /// <summary>        ///get a value of type int/// </summary>        /// <returns></returns>         Public Static intGetInt () {inti;  while(true)            {                Try{i=Convert.ToInt32 (Console.ReadLine ());  Break; }                Catch(FormatException e) {Console.WriteLine (e.message); }            }            returni; }         Public Static intGetInt2 (stringstr) {             while(true)            {                Try                {                    vari =Convert.ToInt32 (str); returni; }                Catch(FormatException e) {Console.WriteLine (e.message); STR=Console.ReadLine (); }            }        }         Public Static stringGetString () {returnConsole.ReadLine (); }         Public Static Doublegetdouble () {Doublei;  while(true)            {                Try{i=convert.todouble (Console.ReadLine ());  Break; }//Catch                Catch(FormatException e) {Console.WriteLine (e.message); }            }            returni; }        #endregion    }}

C # Copy files