$"$

$1.()$enqueue $.$

$2..$

$3..$

$$:

$$: $$ $

$$: $34567$

$$: $34567$

$$

$$

$$: $34567$

$$ $

$$: $34567$

$34567$

$$: $$

$$

$$

$$:

$$

$$ System.Collections$$

$$ StackExamples

$\{$

$$

$\{$

$([])$

$\{$

$$ myStack $=$ new Stack$()$;

bool aBoolean $=$ True;

$$ aCharacter $=\text{'}$$$\text{'}$;

$=34567$;

$$ aString $=""""$

Stack.Push $($aBoolean$)$;

$()$

Stack.Push $($aCharacter$)$

$()$

Stack.Push $($aInteger$)$;

$()$

Stack.Push $($aString$$

$()$

Console.WriteLine$(""\{0\}$

$""$ stack.Peek$())$;

$$

$\{$

$$

$\{$

$=$ Stack.Pop$()$;

Console.WriteLine$($removedObject $+""$popped$"")$;

$\}$

$\}$

$$ af$13($ invalidOperationException$)$

$\{$

Console.Error.WriteLine$($exception$)$;

$\}$

$\}$

PrintStack $()$

$\{$

$(.==0)$

Console.WriteLine$(""$

$"")$;

$$

$\{$

Console.Write$(""$:$"")$;

foreach $($ var $)$

Console.Write$(""\{0\}"")$

Console.WriteLine$(""$

$"")$;

$\}$

$\}$

$\}"$