C # practice capture

Using system; namespace z1_jiuns {public class z1_jiu {public static void main () {string [] namelist = NULL; createnamelist (ref namelist); string [] afternamelist; zhua (namelist, out afternamelist); printnamelist (afternamelist); console. readkey ();} public static void createnamelist (ref string [] beforelist) {beforelist = new string [5]; beforelist [0] = "James "; beforelist [1] = ""; beforelist [2] = ""; beforelist [3] = "Zhao "; beforelist [4] = "Sun Qi ";} public static void zhua (string [] beforelist, out string [] afterlist) {afterlist = new string [1]; int tmpindex =-1; system. random ran = new random (); If (beforelist. length> 0) {console. writeline ("starting to capture failed:"); int tmplength = beforelist. length; For (INT I = 0; I <tmplength; I ++) {console. writeline ("Please press enter to capture details"); console. readline (); tmpindex = ran. next (0, beforelist. length); console. writeline ("the person caught this time" + beforelist [tmpindex]); insertafterlist (beforelist [tmpindex], ref afterlist); removefrombeforelist (tmpindex, ref beforelist);} console. writeline ("Capture ended") ;}} public static void insertafterlist (string insertname, ref string [] afterlist) {afterlist [afterlist. length-1] = insertname; string [] longlist = new string [(afterlist. length + 1)]; for (INT I = 0; I <afterlist. length; I ++) {longlist [I] = afterlist [I];} afterlist = longlist; longlist = NULL;} public static void removefrombeforelist (INT removeindex, ref string [] beforelist) {If (removeindex = (beforelist. length-1) {beforelist [removeindex] = "";} else {int I = 0; for (I = removeindex; I <(beforelist. length-1); I ++) {beforelist [I] = beforelist [I + 1] ;}} if (beforelist. length> 1) {string [] shortlist = new string [(beforelist. length-1)]; for (INT I = 0; I <beforelist. length-1; I ++) {shortlist [I] = beforelist [I];} beforelist = shortlist; shortlist = NULL;} else {beforelist = NULL ;}} public static void printnamelist (string [] list) {console. writeline ("output personnel list below:"); For (INT I = 0; I <list. length; I ++) {console. write (list [I] + "\ t");} console. writeline (); console. writeline ("End of output personnel List ");}}}