using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
class Program
{
static void Main(string[] args)
{
using (StringWriter strWriter = new StringWriter())
{
strWriter.WriteLine("A");
Console.WriteLine(strWriter);
StringBuilder sb = strWriter.GetStringBuilder();
sb.Insert(0, "Hey!! ");
Console.WriteLine("-> {0}", sb.ToString());
sb.Remove(0, "Hey!! ".Length);
Console.WriteLine("-> {0}", sb.ToString());
using (StringReader strReader = new StringReader(strWriter.ToString()))
{
string input = null;
while ((input = strReader.ReadLine()) != null)
{
Console.WriteLine(input);
}
}
}
}
}