C# Online Compiler | .NET Fiddle

using System;
using System.Collections;
using System.Diagnostics; 

public class SamplesStack  {

   public static void PrintValues( IEnumerable myCollection )  {
      foreach ( Object obj in myCollection )
         Console.Write( "    {0}", obj );
      Console.WriteLine();
    }
	
	public static void Main()  {

	  Stopwatch sw = new Stopwatch();  
	  sw.Start(); 
      // Creates and initializes a new Stack.
      Stack myStack = new Stack();
	  sw.Stop();  
	  Console.WriteLine("Initialize in {0} ticks.", sw.ElapsedTicks);
      sw.Reset(); 
	  sw.Start(); 
	  myStack.Push("Hello");
	  sw.Stop();  
	  Console.WriteLine("Push in {0} ticks.", sw.ElapsedTicks);
	  sw.Reset(); 
      sw.Start(); 
	  myStack.Push("World");
	  sw.Stop();  
	  Console.WriteLine("Push in {0} ticks.", sw.ElapsedTicks);
      sw.Reset(); 
	  sw.Start(); 
	  myStack.Push("!");
	  sw.Stop();  
	  Console.WriteLine("Push in {0} ticks.", sw.ElapsedTicks);
		
	  sw.Reset(); 
	  sw.Start(); 
	  myStack.Pop();
	  sw.Stop();  
	  Console.WriteLine("Pop in {0} ticks.", sw.ElapsedTicks);
    
	  sw.Reset(); 
	  sw.Start(); 
	  myStack.Pop();
	  sw.Stop();  
	  Console.WriteLine("Pop in {0} ticks.", sw.ElapsedTicks);
    
      // Displays the properties and values of the Stack.
      Console.WriteLine( "myStack" );
      
	  int stackcnt = 0; 
	  sw.Reset(); 
	  sw.Start(); 
	  stackcnt = myStack.Count;  
	  sw.Stop();  
	  Console.WriteLine( "\tCount:    {0}", stackcnt );
	  Console.WriteLine("Count in {0} ticks.", sw.ElapsedTicks);
      
	  Console.Write( "\tValues:" );
      PrintValues( myStack );
   }

   
}

 
using System;
using System.Collections;
using System.Diagnostics; 
​
public class SamplesStack  {
​
   public static void PrintValues( IEnumerable myCollection )  {
      foreach ( Object obj in myCollection )
         Console.Write( "    {0}", obj );
      Console.WriteLine();
    }
    
    public static void Main()  {
​
      Stopwatch sw = new Stopwatch();  
      sw.Start(); 
      // Creates and initializes a new Stack.
      Stack myStack = new Stack();
      sw.Stop();  
      Console.WriteLine("Initialize in {0} ticks.", sw.ElapsedTicks);
      sw.Reset(); 
      sw.Start(); 
      myStack.Push("Hello");
      sw.Stop();  