Stack.Clone() Method in C#
Last Updated :
05 Feb, 2019
This method is used to create a shallow copy of the Stack. It just creates a copy of the Stack. The copy will have a reference to a clone of the internal data array but not a reference to the original internal data array.
Syntax: public virtual object Clone ();
Return Value: The method returns an Object which is just the shallow copy of the Stack.
Example 1: Let’s see an example without using a Clone() method and directly copying a Stack using assignment operator ‘=’. In the below code, we can see even if we Pop() elements from myStack2, contents of myStack is also changed. This is because ‘=’ just assigns the reference of myStack to myStack2 and does not create any new Stack. But Clone() creates a new Stack.
using System;
using System.Collections;
class GFG {
public static void Main( string [] args)
{
Stack myStack = new Stack();
myStack.Push( "C" );
myStack.Push( "C++" );
myStack.Push( "Java" );
myStack.Push( "C#" );
Stack myStack2 = myStack;
myStack2.Pop();
PrintValues(myStack);
}
public static void PrintValues(IEnumerable myCollection)
{
foreach (Object obj in myCollection)
Console.WriteLine(obj);
}
}
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Example 2:
using System;
using System.Collections;
class MainClass {
public static void Main( string [] args)
{
Stack myStack = new Stack();
myStack.Push( "1st Element" );
myStack.Push( "2nd Element" );
myStack.Push( "3rd Element" );
myStack.Push( "4th Element" );
Stack myStack3 = (Stack)myStack.Clone();
myStack3.Pop();
PrintValues(myStack);
}
public static void PrintValues(IEnumerable myCollection)
{
foreach (Object obj in myCollection)
Console.WriteLine(obj);
}
}
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Output:
4th Element
3rd Element
2nd Element
1st Element
Reference:
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