C# Working With string part 2

Consider this example, which uses Replace, Insert, and ToUpper:

public class TestStringsApp

{ 

    public static void Main(string[] args) 

    { 

         string a = "strong"; // Replace all 'o' with 'i' 

         string b = a.Replace('o', 'i'); 

         Console.WriteLine(b);

         string c = b.Insert(3, "engthen"); string d = c.ToUpper(); 

         Console.WriteLine(d); 

    }

}

The output from this application will be:

string STRENGTHENING