using System; using System.Globalization; class GreenvilleRevenue $\{$ static void Main$()\{//$ Declare variables to store user inputs int lastYearContestants, thisYearContestants; double revenue; $//$ Get the number of contestants last year with input validation Console.Write$("$Enter number of contestants last year $>>")$; while $(!$int.TryParse$($Console$.$ReadLine$(),$ out lastYearContestants$))\{$ Console.WriteLine$("$Invalid format $-$ please enter a valid integer."$)$; Console.Write$("$Enter number of contestants last year $>>")$; $\}//$ Get the number of contestants this year with input validation Console.Write$("$Enter number of contestants this year $>>")$; while $(!$int.TryParse$($Console$.$ReadLine$(),$ out thisYearContestants$))\{$ Console.WriteLine$("$Invalid format $-$ please enter a valid integer."$)$; Console.Write$("$Enter number of contestants this year $>>")$; $\}//$ Display the number of contestants for both years Console.WriteLine$("$Last year's competition had $\{0\}$ contestants, and this year's has $\{1\}$ contestants", lastYearContestants, thisYearContestants$)$; $//$ Calculate and display the expected revenue for this year revenue $=$ thisYearContestants $*25\mathrm{.}0$; Console.WriteLine$("$Revenue expected this year is $\{0\}",$ revenue.ToString$("$C$",$ CultureInfo.GetCultureInfo$("$en$-$US$")))$; $//$ Display a message indicating the competition is bigger than ever Console.WriteLine$("$The competition is bigger than ever!"$)$; $//$ Variables for talent counting and contestant names string contestantName, talentCode; int singingCount $=0,$ dancingCount $=0,$ instrumentCount $=0,$ otherCount $=0$; $//$ Get the contestant name with input validation Console.Write$("$Enter contestant name $>>")$; contestantName $=$ Console.ReadLine$()$; while $($true$)\{//$ Display talent codes Console.WriteLine$("$Talent codes are:"$)$; Console.WriteLine$("$ S Singing"$)$; Console.WriteLine$("$ D Dancing"$)$; Console.WriteLine$("$ M Musical instrument"$)$; Console.WriteLine$("$ O Other"$)$; $//$ Get talent code with input validation Console.Write$("$ Enter talent code $>>")$; talentCode $=$ Console.ReadLine$()$; char talent; $//$ Validate talent code and update counts accordingly if $($char$.$TryParse$($talentCode$,$ out talent$))\{$ switch $($talent$)\{$ case $\text{'}$S$\text{'}$: singingCount$++$; break; case $\text{'}$D$\text{'}$: dancingCount$++$; break; case $\text{'}$M$\text{'}$: instrumentCount$++$; break; case $\text{'}$O$\text{'}$: otherCount$++$; break; default: Console.WriteLine$("$That is not a valid code"$)$; continue; $\}\}$ else $\{$ Console.WriteLine$("$Invalid format $-$ entry must be a single character"$)$; continue; $\}//$ Get the contestant name with input validation Console.Write$("$Enter contestant name $>>")$; contestantName $=$ Console.ReadLine$()$; $//$ Display the types of talent and their counts Console.WriteLine$("$The types of talent are:"$)$; Console.WriteLine$("$Singing $\{0\}",$ singingCount$)$; Console.WriteLine$("$Dancing $\{0\}",$ dancingCount$)$; Console.WriteLine$("$Musical instrument $\{0\}",$ instrumentCount$)$; Console.WriteLine$("$Other $\{0\}",$ otherCount$)$; $//$ Get the talent type or allow the user to quit Console.Write$("$Enter a talent type or Z to quit $>>")$; talentCode $=$ Console.ReadLine$()$; if $($talentCode$.$ToUpper$()=="$Z$")$ break; $\}\}\}$