using System;

public class Program

{

    public static void Main()

    {

        //1. Read string from the user and show the length of the name string

        Console.WriteLine("Please enter your name");

        //[Code] Read string from the use

        string name = Console.ReadLine();

        //[Code] Print out Length of Name

        Console.WriteLine("The length of \"{0}\" is {1}", name, name.Length);

        Console.WriteLine("===================");

​

        //2. Transformations (upper and lower case)

        string strTransformation = "My FIrst stRinG.";

        //[Code] Print lower case

        Console.WriteLine("The lowercase of \"{0}\" is \"{1}\"", strTransformation, strTransformation.ToLower());

        //[Code] Print upper case

        Console.WriteLine("The lowercase of \"{0}\" is \"{1}\"", strTransformation, strTransformation.ToUpper());

        Console.WriteLine("===================");

​

        //3. Trimming

        string strTrim = " my   string         test    ";

        //[Code] print out trimming content

        Console.WriteLine("The trim of \"{0}\" is \"{1}\"", strTrim, strTrim.Trim());

        Console.WriteLine("===================");

​

        //4. Search

        string strSample = "Is it a book?";

        bool bolHasPeriod = false;

        //[Code] Does this string contain a period?

        bolHasPeriod = strSample.Contains(".");

        Console.WriteLine("bolHasPeriod:" + bolHasPeriod);

        bool bolIsStartWithIs = false;

        //[Code] Does this string start with "Is"?

        bolIsStartWithIs = strSample.StartsWith("Is");

        Console.WriteLine("bolIsStartWithIs:" + bolIsStartWithIs);

        bool bolIsQuestion = false;

        //[Code] Does this string end with a question mark?

        bolIsQuestion = strSample.EndsWith("?");

        Console.WriteLine("bolIsQuestion:" + bolIsQuestion);

        //[Code] Where is the first "n"?

        strSample = "Indiana University";

        int intN = 0;

        intN = strSample.IndexOf("n");

        Console.WriteLine("intN:" + intN);

        Console.WriteLine("=========================");

​

        //5. Substring

        string strEmail = "superman@iu.edu";

        //[Code] print out username

        int indexOfAt = strEmail.IndexOf("@");

        string username = strEmail.Substring(0, indexOfAt);

​

        //[Code] print out domain name

        string domain = strEmail.Substring(indexOfAt+1);

        Console.WriteLine("username={0}, domain={1}", username, domain);

        Console.WriteLine("===================");

​

        //6. Replace, Remove, Insert

        string strPhone = "812.212.3456";

        //[Code] Replace . with *

        Console.WriteLine("strPhone:" + strPhone);

        strPhone = "812.212.3456";

        //[Code] Remove "212"

        Console.WriteLine("strPhone:" + strPhone);

        strPhone = "8122123456";

        //[Code] Add (). For instance: (812)2123456

        Console.WriteLine("strPhone:" + strPhone);

        Console.WriteLine("===================");

    }

}