using System;

using System.Globalization;

class Contestant

$\{$

public string Name $\{$ get; set; $\}$

public char TalentCode $\{$ get; set; $\}$

public string TalentDescription $\{$ get; set; $\}$

public double Fee $\{$ get; set; $\}$

$//$ Talent code descriptions

public static string GetTalentDescription$($char code$)$

$\{$

switch $($code$)$

$\{$

case $\text{'}$S$\text{'}$: return "Singing";

case $\text{'}$D$\text{'}$: return "Dancing";

case $\text{'}$M$\text{'}$: return "Muusing System;

using System.Globalization;

class Contestant

$\{$

$$ public string Name $\{$ get; set; $\}$

$$ public char TalentCode $\{$ get; set; $\}$

$$ public string TalentDescription $\{$ get; set; $\}$

$$ public double Fee $\{$ get; set; $\}$

$//$ Talent code descriptions

$$ public static string GetTalentDescription$($char code$)$

$\{$

$$ switch $($code$)$

$\{$

$$ case $\text{'}$S$\text{'}$: return "Singing";

$$ case $\text{'}$D$\text{'}$: return "Dancing";

$$ case $\text{'}$M$\text{'}$: return "Musical instrument";

$$ case $\text{'}$O$\text{'}$: return "Other";

$$ default: return "Unknown"; $//$ If unknown talent code

$\}$

$\}$

$//$ Constructor for initializing fields

$$ public Contestant$()$

$\{$

$$ TalentDescription $=$ "Unknown"; $//$ Default value for invalid talent codes

$\}$

$$ public virtual void SetName$($string name$)$

$\{$

$$ Name $=$ name;

$\}$

$$ public virtual void SetTalentCode$($char code$)$

$\{$

$$ TalentCode $=$ code;

$$ TalentDescription $=$ GetTalentDescription$($code$)$; $//$ Set the correct description

$\}$

$$ public virtual void SetFee$($double fee$)$

$\{$

$$ Fee $=$ fee;

$\}$

$$ public virtual string ToString$()$

$\{$

$$ return $$"\{$Name$\}$ Talent: $\{$TalentCode$\}\{$TalentDescription$\}$ Fee $\{$Fee$.$ToString$("$C$",$ CultureInfo.GetCultureInfo$("$en$-$US$"))\}"$;

$\}$

$\}$

class ChildContestant : Contestant

$\{$

$$ public ChildContestant$()$

$\{$

$$ Fee $=15\mathrm{.}00$; $//$ Default fee for child contestants

$\}$

$$ public override string ToString$()$

$\{$

$$ return $"Child Contestant $\{$base$.$ToString$()\}"$;

$\}$

$\}$

class TeenContestant : Contestant

$\{$

$$ public TeenContestant$()$

$\{$

$$ Fee $=20\mathrm{.}00$; $//$ Default fee for teen contestants

$\}$

$$ public override void SetTalentCode$($char code$)$

$\{$

$$ base.SetTalentCode$($code$)$;

$//$ Override TalentDescription to always be "Unknown"

$$ TalentDescription $=$ "Unknown";

$\}$

$$ public override string ToString$()$

$\{$

$$ return $"Teen Contestant $\{$Name$\}$ Talent: $\{$TalentCode$\}$ Unknown $$ Fee $\{$Fee$.$ToString$("$C$",$ CultureInfo.GetCultureInfo$("$en$-$US$"))\}"$;

$\}$

$\}$

class AdultContestant : Contestant

$\{$

$$ public AdultContestant$()$

$\{$

$$ Fee $=30\mathrm{.}00$; $//$ Default fee for adult contestants

$\}$

$$ public override void SetTalentCode$($char code$)$

$\{$

$$ base.SetTalentCode$($code$)$;

$//$ Override TalentDescription to always be "Unknown"

$$ TalentDescription $=$ "Unknown";

$\}$

$$ public override string ToString$()$

$\{$

$$ return $"Adult Contestant $\{$Name$\}$ Talent: $\{$TalentCode$\}$ Unknown $$ Fee $\{$Fee$.$ToString$("$C$",$ CultureInfo.GetCultureInfo$("$en$-$US$"))\}"$;

$\}$

$\}$

class Program

$\{$

$$ static void Main$()$

$\{$

$//$ Display the talent codes and descriptions

$$ Console.WriteLine$("$Talent codes are:"$)$;

$$ Console.WriteLine$("$S $$ Singing"$)$;

$$ Console.WriteLine$("$D $$ Dancing"$)$;

$$ Console.WriteLine$("$M $$ Musical instrument"$)$;

$$ Console.WriteLine$("$O $$ Other"$)$;

$//$ Display the expected revenue

$$ double revenue $=65\mathrm{.}00$;

$$ Console.WriteLine$($$"Revenue expected this year is $\{$revenue$.$ToString$("$C$",$ CultureInfo.GetCultureInfo$("$en$-$US$"))\}")$;

$//$ Create contestants and display their details

$$ ChildContestant child $=$ new ChildContestant$()$;

$$ child.SetName$("$Joe S$")$;

$$ child.SetTalentCode$(\text{'}$S$\text{'})$; $//$ Set talent code

$$ Console.WriteLine$($child$.$ToString$())$;

$$ TeenContestant teen $=$ new TeenContestant$()$;

$$ teen.SetName$("$Ellen$")$;

$$ teen.SetTalentCode$(\text{'}$M$\text{'})$; $//$ Valid code for TeenContestant

$$ Console.WriteLine$($teen$.$ToString$())$;

$$ AdultContestant adult $=$ new AdultContestant$()$;

$$ adult.SetName$("$Kelly$")$;

$$ adult.SetTalentCode$(\text{'}$D$\text{'})$; $//$ Valid talent code

$$ Console.WriteLine$($adult$.$ToString$())$;

$\}$

$\}$