using System;

namespace Example46
{
	/// <summary>
	/// Summary description for Class1.
	/// </summary>
	class Replace
	{
		String myString;

		public Replace(String s)
		{
			myString = s;
		}

		public String MyReplace(String oldWord, String newWord)
		{
			String temp = myString;

			int position = temp.IndexOf(oldWord);

			while (position != -1)
			{
				temp = temp.Substring(0,position) + newWord + 
					temp.Substring(position + oldWord.Length);

				position = temp.IndexOf(oldWord, position + newWord.Length);
			}

			return temp;
		}

		public override string ToString()
		{
			return myString;
		}

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main(string[] args)
		{
			Console.WriteLine("Enter a String which includes \"fish\": ");

			Replace phrase = new Replace(Console.ReadLine());

			Console.WriteLine("pharse= " + phrase);

			String changed = phrase.MyReplace("fish","table");

			Console.WriteLine("The new string is {0}", changed);
		}
	}
}