2.2.3　字符串（3）

class PalindromeLength
{
static void Main()
{
string palindrome;

      System.Console.Write("Enter a palindrome: ");
palindrome = System.Console.ReadLine();

      System.Console.WriteLine(
"The palindrome, \"{0}\" is {1} characters.",
palindrome, palindrome.Length);
}
}

Enter a palindrome: Never odd or even
The palindrome, "Never odd or even" is 17 characters.

class Uppercase
{
static void Main()
{
string text;

      System.Console.Write("Enter text: ");
text = System.Console.ReadLine();

      // UNEXPECTED: Does not convert text to uppercase           
text.ToUpper();                                             

      System.Console.Write-Line(text);
}
}

 Enter text: This is a test of the emergency broadcast system.
This is a test of the emergency broadcast system. 

class Uppercase
{
static void Main()
{
string text, uppercase;

      System.Console.Write("Enter text: ");
text = System.Console.ReadLine();

      // Return a new string in uppercase
uppercase = text.ToUpper();  

      System.Console.WriteLine(uppercase);
}
}

Enter text: This is a test of the emergency 
broadcast system.
THIS IS A TEST OF THE EMERGENCY BROADCAST SYSTEM.

text = text.ToUpper();