using System;
public class StringTest
{
public static void Main()
{
string test1 = "This is a test string";
string test2, test3;
test2 = test1.Insert(15, "application ");
test3 = test1.ToUpper();
Console.WriteLine("test1: '{0}'", test1);
Console.WriteLine("test2: '{0}'", test2);
Console.WriteLine("test3: '{0}'", test3);
if (test1 == test3)
Console.WriteLine("test1 is equal to test3");
else
Console.WriteLine("test1 is not equal to test3");
test2 = test1.Replace("test", "sample");
Console.WriteLine("the new test2: '{0}'", test2);
}
}